The unofficial titles of some eras such as Age of Fishes, Age of Reptiles and Age of Mammals are really informative and they are not oversimplifications because these periods reflect the emergence of different taxonomic groups in the course of evolution.
What are animal eras?The animal eras are periods during the geological time in which certain groups of animals appeared in the course of evolution, which results informative to determine how evolution (change) occurred due to natural selection.
For example, mammals emerged as a taxonomic group during the Cenozoic Era, which occurred approximately 65 million years ago and this period is known as the Age of mammals.
Therefore, with this data, we can see that an animal era is not only an oversimplified term because it also involves the emergence of certain taxonomic groups during the evolution and can serve to contextualize geological periods in a biological framework.
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Gavin has just woken up with a sudden fever that has spiked and has developed a rash in the last 24
hours that has turned into blisters that burst easily when touched. A sample was taken and sent off for
microbiological studies and grew a gram positive cocci, catalase positive, coagulase positive. What is the
name of this disease? What is the causative agent?
Gram-positive cocci, catalase positive, and coagulase positive is due to Staphylococcus aureus, which is the bacterium that causes bacterial tracheitis.
What is bacterial tracheitis?Bacterial tracheitis is a bacterial disease associated with pneumonia which is caused by Staphylococcus aureus bacteria and it has as its main symptom a high fever as well as difficulty for breathing, thereby it should be immediately treated in clinical settings.
Therefore, with this data, we can see that bacterial tracheitis is a life treating disease caused by the Staphylococcus aureus bacteria and it is associated with high fever symptoms.
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Help!!!
What does it mean for an
angiosperm to be annual?
A. It has a two-year life cycle, one as a
sapling and the next to bloom and
reproduce.
B. It grows, flowers, reproduces and
dies all in one year.
C. It will remain alive underground and
for many years will grow, flower, and
reproduce.
Answer:
I think it's B. It grows, flowers, reproduces and dies all in one year.
Explanation:
B because annual means occurring every one year, so you can cancel out A because it says "two-year life cycle". You can also cancel C because angiosperms can't live underground.
Which stage of cell cycle does cells divide into 2 cells
Answer: Cytokinesis
Explanation: P. S. it's not a stage, just the final step.
hope this helps.
41) Which of the following processes happens
during meiosis I?
A) Homologous chromosomes of a pair are
separated from each other.
B) The chromosome number per cell is conserved.
C) Sister chromatids are separated.
D) Four daughter cells are formed.
In meiosis I, homologous chromosomes of a pair are separated from each other. Option A.
What is meiosis?Meiosis is otherwise known as the division of sex cells or reductional division. It is a division in which diploid cells divide to produce haploid cells.
Meiosis occurs in 2 main stages:
Meiosis IMeiosis IIMeiosis I consists of prophase I, metaphase I, anaphase I, and telophase I. Meiosis II, on the other hand, consists of prophase II, metaphase II, anaphase II, and telophase II.
At the prophase I stage of meiosis I, chromatin materials thicken to form threads and homologous chromosomes pair up to form a tetrad. Non-sister chromatids then go ahead to exchange chromosomal segments in a process known as crossing over.
At metaphase I, paired homologous chromosomes line up at the center of the cell to form a metaphase plate. Spindle fibers engage each tetrad.
At anaphase I, homologous chromosomes of a pair are pulled apart by the shortening of the spindle fibers. Their journey to the poles is completed at telophase I. This effectively ends the journey of meiosis I before the cell proceeds to meiosis II.
In other words, the separation of homologous chromosomes of a pair happens during meiosis I.
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Which of the following would
NOT be considered a woody
plant?
A. shrub
B. cacti this
C. tree
D. vine
Question 7
A Split-brain operation cuts the
O Hippocampus; insomnia
O Glia; seizures
O Glia; insomnia
O Corpus callosum; seizures
to prevent
Answer:
A Hippocampus; insomnia
An organism's genotype is (1 point)
O a trait that is expressed in a homozygous individual.
O an allele that is expressed whenever it is present.
O an observable trait.
O the set of alleles an organism has for a trait.
Answer:
4th option (last option)
A giant redwood tree captures sunlight with its leaves and uses that energy to create sugars to fuel cellular p Which characteristic of life does this trait best represent? O metabolism O response O growth and development O cellular organiz
Answer:
photosynthesis
3. List the main phases of mitosis in order from start to finish. *
The main phases of mitosis in order from start to finish are as follows:
ProphasePrometaphaseMetaphaseAnaphaseTelophase.What is Mitosis?Mitosis may be defined as a type of cell division through which a parental cell is successfully divided into two daughter cells. These daughter cells are genetically identical to the parental cells and generally diploid in nature.
Prophase is the longest phase of karyokinesis. In this phase, the nuclear membrane and nucleolus disappear. In metaphase, the chromosomes are usually lined up in one plane by attaching to the spindle through the centromere.
Anaphase is the smallest phase of mitotic cell division. In this phase, the centromere splits, and chromosomes move to opposite poles. In telophase, the two sets of daughter chromosomes reached opposite poles and are converted into chromatin thread.
Therefore, the main phases of mitosis order from start to finish are well described above.
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tRNA has an _____ at one end that compliments the mRNA codon and an _____ at the other end.
Answer:
tRNA has an anticodon at one end that compliments the mRNA codon and an attachment site to a specific amino acid that corresponds to the anticodon sequence at the other end.
explain the role of every organization and media in contagion movie ?
Users commonly expressed unpleasant sentiments on social media platforms and shared those emotions.
What are social networking sites used for?The term "social media" refers to online platforms that enable people to share, create, and/or exchange knowledge and ideas with one another. In charge of managing is the Office of Communications und Marketing.
What is the function of social media?Social media is used by billions of people to communicate and exchange information on a global scale. Social media allows you to connect with loved ones, learn new things, pursue your interests, and find enjoyment for yourself.
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The main characteristic of the first stage of photosynthesis is
A the production of hydrogen and energy
B the production of hydrogen and glucose
C the release of oxygen and carbon dioxide
D the storage of glucose in the plant's cells
Answer:
The answer to the following would be A the production of hydrogen and energy.
Have a nice day!^^
Explanation:
What happens to the cell itself once all its processes are focused on building new viruses?
in a developing embryo, what process allows cells of the mesoderm to give rise to muscle bone, and heart tissue
Answer:
cell differentiation
Explanation:
A. vascular tissue
B. ground tissue
C. nervous tissue
D. dermal tissue
Which of the
following is NOT a
tissue you would
find in a plant?
C
Nervous tissue is not found in plant instead they have some different system to respond to stimuli.
Biologists are aware that there are additional ways to process information in addition to our neurological systems and those of other animals, including fish. Plants can react to stimuli despite not having neural systems. For instance, when an aphid bites a leaf, the plant responds by sending an electrical signal from leaf to leaf instructing it to begin defending itself.
However, it's crucial to remember that a plant does not necessarily feel pain when it reacts to injury.
Plants lack nociceptors, the particular receptor types that are hardwired to respond to pain, in contrast to humans and other animals. They naturally lack the brains essential to convert such sensations into actual experiences since they also lack brains.
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Calculate allele frequencies in 5th generation. Record in Lab Data
Calculate genotype frequencies and number of moths in 5th generation. Record in Lab Data
Allelic frequencies ⇒ q = 0.9, p = 0.1. Genotypic frequencies ⇒ q² = 0.81, 2pq = 0.18, p² = 0.01. Number of individuals with each genotype ⇒ homozygous recessive = 850.5 individuals. Heterozygous = 189 individuals. Homozygous dominant = 10.5 individuals.
To answer this question, we will assume this moth population is in Hardy-Weinberg equilibrium.
What is the Hardy-Weinber equilibrium?
Hardy-Weinberg equilibrium is a theory that proposes that when populations are in equilibrium they are not evolving. And if populations are not evolving, their allelic and genotypic frequencies remain the same generation after generation.
Assuming diallelic genes code for a particular feature,
Allelic frequency
f(X) ⇒ p ⇒ frequency of the dominant allelef(x) ⇒ q ⇒ frequency of the recessive alleleGenotypic frequencies
F(XX) ⇒ p² ⇒ homozygous dominant frequencyF(Xx) ⇒ 2pq ⇒ heterozygous frequencyF(xx) ⇒ q² ⇒ homozygous recessive frequencyIn populations that are in Hardy-Weinberg equilibrium, the addition of allelic and genotypic frequencies will always equal 1.
p + q = 1p² + 2pq + q² = 1Now, we will use this framework to get the allelic and genotypic frequencies of the 5th generation.
We know that,
1000 moths were released in a forest (N = 1000). 250 were white (Typica), and 750 were black (Carbonaria).A diallelic gene codes for color. The dominant allele -D- codes for black (carbonaria), and the recessive allele -d- codes for white (Typica).Once released, these individuals produced five new generations, G1, G2, G3, G4, G5.G5 is composed of 851 white individuals (typica) and 199 dark individuals (carbonaria). The total number of individuals is 199 + 851 = 1050.1) Phenotype frequencies
Now that we have the number of individuals expressing each color and the total number of individuals, we can get the phenotypic frequencies.
To calculate them we just need to divide the number of individuals with each phenotype by the total number of individuals in this generation. So,
Total number of individuals in G5 → 1050White = Typica = 851 individualsBlack = Carbonaria = 199 individuals⇒ F(Typica) = 851 / 1050 = 0.81
⇒ F(Carbonaria) = 199 / 1050 = 0.189 ≅ 0.19
Notice that these frequencies were already given in the Phenotype Frequency table.
2) Allelic Frequencies
Now, we will use the phenotypic frequencies to get the allelic frequencies.
Carbonaria (black) is the dominant phenotype, so it includes homozygous dominant individuals (DD) and heterozygous individuals (Dd). We can not get the allelic frequencies from this data.
So, to get the allelic frequencies we will use the recessive phenotypic frequency because it only includes homozygous recessive individuals, dd.
Homozygous recessive Gentoypic frequency = Recessive Phenotypic frequencyGenotypic frequency → F(dd) → Represented as q²F(Typica) = F(dd) = q² = 0.81Recessive allele → dRecessive allelic frequency → f(d) → Represented as qf(d) = q = ??
q² = 0.81
q = √ 0.81
q = 0.9
0.9 is the recessive allelic frequency.
With this data we will calculate the dominant allelic frequency. To do this, we will clear the following formula,
p + q = 1
p + 0.9 = 1
p = 1 - 0.9
p = 0.1
So, now we also know that
⇒ f(D) = p = 0.1
⇒ f(d) = q = 0.9
3) Genotypic Frequencies
Now, we need to get the genotypic frequencies, F(xx)
⇒ F(DD) = p² = 0.1² = 0.01
⇒ F(Dd) = 2pq = 2 x 0.9 x 0.1 = 0.18
⇒ F(dd) = q² = 0.9² = 0.81
4) Number of individuals
Finally, we need to tell the number of individuals with each genotype. We just need to multiply each frequency by the total number of individuals in G5.
F(DD) = p² = 0.01F(Dd) = 2pq = 0.18F(dd) = q² = 0.81Total number of individuals = 1050
⇒ DD Black -Carbonaria- individuals → 0.01 x 1050 = 10.5
⇒ Dd Black -Carbonaria- individuals → 0.18 x 1050 = 189
⇒ dd White -Typica- individuals → 0.81 x 1050 = 850.5
From this results, we can conclude that the moths population is not in H-W equilibrium, because their allelic and genotypic frequencies changed through generations.
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Question 9 of 10
Which definition best describes a base?
Answer:
Explanation:
1
Describe two ways that reproduction is different between mosses and conifers. Discuss the process and the product.
Habitat fragmentation is
caused by...
A.
overpopulation.
B. moving a species of animal to a different habitat.
C, oil spill from a boat in the ocean.
D. pieces of a habitat being divided.
Habitat fragmentation is caused by moving a species of animal to a different habitat. Option B.
Fragmentation occurs when part of a habitat is destroyed leaving a small unconnected area. It can occur naturally as a result of fires or volcanic eruptions but is usually due to human activity. A simple example is building a road through a forest.
Habitat fragmentation is defined as the process by which large habitats are transformed into a series of small patches of smaller total area separated by a habitat matrix distinct from the original habitat. Forest fragmentation can be caused by natural causes, such as lava flows and other natural disasters, or by anthropogenic causes, such as the conversion of forests to agricultural land or the development of infrastructure in protected areas.
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Answer:
b) moving a species of animal to a different habitat.
Explanation:
Habitat fragmentation is caused by moving a species of animal to a different habitat. Hence, the option (b) is correct.
examples and non examples of a electron
Answer:
[Example]
Electrons are the smallest of the particles that make up an atom, and they carry a negative charge. The number of protons and electrons is equal in a neutral atom. The hydrogen atom, for example, has just one electron and one proton. The uranium atom, on the other hand, has 92 protons, and therefore, 92 electrons.[Non examples]
Protons because a proton is positivelycharged & the electrons of negatively charged.In the lungs of birds, where does gas exchange occur?
A. Across thin parenchymal cells in the alveoli
B. In the alveolar sacs
C. Across a thin network of bronchioles and blood vessels
D. Inside of the air sacs
A diagram of an ATP molecule is shown below.
ATP MOLECULE
Bond Bond
2
doo
Bond
Bond
3
4
Which bond is broken first to release energy for cell use?
O Bond 4
O Bond 1
O Bond 3
O Bond 2
Chemical reactions which release energy are referred to as exothermic when bond 3 is first broken for cellular utilization.
what is the importance of energy?Due to the fact that it is a fundamental human requirement, energy is crucial to our daily existence. Our constructions, which are constructed by humans, are heated and cooled by energy. Even the simplest tasks like lifting your finger or getting out of bed require energy.
What elements comprise energy?Energy is a phrase used to describe a property of matter or non-matter fields; energy is not a substance in and of itself. For instance, it's argued that kinetic energy exists when a substance moves. Potential energy comes in many different forms as well.
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The diagram shows the structure of an organic molecule. A student
identifies the molecule as DNA. Does the student identify the
molecule correctly?
-phosphorus
-pentose
sugar
nucleoside
G
U
C
_nitrogenous
base
OYes. It is a single stranded molecule.
O No. It contains a five-carbon sugar.
No. It contains the nitrogenous base uracil.
OYes. It has a sugar-phosphate backbone.
Answer: No. It contains the nitrogenous base uracil
Explanation:
DNA does not contain Uracil. Uracil is used by RNA in place of Thymine.
Which process would change metamorphic rock to igneous rock?
O melting followed by cooling
O pressure followed by weathering
O erosion followed by compaction
O cooling followed by cementation
Answer:
The correct answer is Option A.
Explanation:
A metamorphic rock becomes an igneous rock through the process of solidification. In this process, the atoms in the rock rearrange themselves until they form a solid structure. The atoms in a liquid or gas are in constant motion, but when they are solidified, they form a fixed, crystalline structure.
Answer:
A is the right answer
Explanation:
I got it right
HELP PLEASE
Does protein for fur have more energy than collagen?
If so come up with a hypothesis as to why it takes more energy to form some proteins than others.
Yes, Does protein for fur have more energy than collagen. The hypothesis as to why it takes more energy to form some proteins than others is that doing more work requires more energy from your body, that results in increased calorie burn.
How much energy does whey protein provide?One of the most often utilized proteins is whey protein, which is ideal for daily use. It is easily digestible and includes all nine necessary amino acids. It can lower stress levels and increase energy.
Note that Fur proteins are widespread transcriptional controllers that were once thought to be solely responsible for maintaining iron homeostasis in most prokaryotes. They utilize ferrous iron as a co-regulator by binding to specific sequences (Fur boxes) found in the upstream promoter region of the iron sensitive genes (Fillat 2014).
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What is the missing word? Stem cells have not yet __________, so they retain the ability to develop into other types of cells.
People who get better grades in school will be more successful in life. agree or disagree
response must be at least 5-7 sentences in length.
There is no conclusive connection between achieving high academic standing and having a high income.
Can you succeed if you don't get good grades?The truth is that grades are really not that significant. Regrettably, valedictorian status doesn't carry much weight in the actual world. After having less than outstanding academic careers, some of the world's most successful individuals have gone on to have amazing careers in business and public life.
Are grades crucial to success?When it comes to getting into college, high school grades are most important. When considering whether to admit or reject a student, institutions may take into account their grade point average (GPA). Your college grades are even more crucial if you plan to enroll in graduate or professional school.
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MItosis:
Takes one cell and replicates it into two genetically identical cells.
Takes one cell and replicates it into two genetically unique cells.
Takes two cells, one from each parent, and replicate it into four genetically unique cells.
Takes one cell and replicates it into four cells, each with half of the original cell's genetic information.
Answer: hope this helps have a wonderful day
the answers are adcdbcbcacdbc
Explanation: written questions
1. Raul has scraped his knee and noticed that after a week it had almost completely healed. Raul wondered how the skin was able to repair itself while looking exactly the same as his non-injured skin. In 3-5 sentences explain how mitosis plays a role in healing skin after injury and is able to maintain the look of the existing, non-injured skin
Injured skin produces C-rays that allow for skin to knit itself back together. These C-rays are always present in cells, but are only activated during mitosis by injured skin. This is why there is sometimes scarring left after injury, as the C-rays are not activated as much as healing occurs.
2. In three to five sentences, explain the advantage of keeping some DNA needed by mitochondria in the cell’s nucleus and some in the mitochondria itself.
Mitochondrial DNA is the small circular chromosome present inside the cell organelle called mitochondria used for energy production. This type of DNA passes from the mother to the offspring. Mitochondrial DNA (mtDNA) has several advantages over nuclear DNA (nDNA):for species identification purposes including a higher copy number a lack of sequence ambiguities from heterozygous genotypes .a faster rate of mutation
3. In 3–5 sentences, construct a summary of the process of gene expression, starting with DNA and ending with proteins
The process of gene expression starts with the transcription of the genetic information in the DNA into genetic codes in the form of messenger RNA.
The messenger RNA then undergoes some processing such as modification of tails and removal of non-coding sequence before the genetic codes are translated to their respective amino acids in a process known as translation.
The amino acids are linked together by peptide bonds and the resulting primary protein structure is folded in specific ways depending on their functions.
Mitosis takes one cell and replicates it into two genetically identical cells. Thus, the correct option for this question is A.
What is Mitosis?Mitosis may be defined as a type of cell division through which each parental cell is typically divided into two daughter cells. These daughter cells are genetically identical to the parental cell and are mostly diploid in nature.
On contrary, meiosis is another type of cell division in which each parental cell is divided into four daughter cells which are genetically unique to the parental cell. These daughter cells are haploid in nature. This type of division is known as reductional division. It occurs in the germ cells of organisms.
Therefore, mitosis takes one cell and replicates it into two genetically identical cells. Thus, the correct option for this question is A.
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A student is setting up an experiment. The student has 20 identical young plants and will try to answer this question how does the amount of water give it to these plants each day affect how tall the plants grow? 1.State an appropriate hypothesis for this experiment.2. Identify one condition other than identical young plants that should be held constant during the experiment. 3. Identify one measurement tool needed for this experiment and describe the type of data measured by this tool. Measurement tool:
Type of data measured by tool
1) Hypothesis: If the plant receives the same amount of water every day, it will grow taller than plants that receive different daily amounts of water. 2) Controlled variable: Light exposure. 3) Measurement tool: Millimeter ruler.
What is a hypothesis and controlled variables?
A hypothesis is a scientific conjecture, not verified, that requires corroboration. It is a claim of how it works a relationship between two or more variables.
The researcher hypothesizes to predict what is going on or what is expected to occur.
A hypothesis
• must be clear and comprehensive.
• must express the direct relationship between the involved variables.
• must be objective.
• must be testeable and falsifiable
Controlled variables are those that need to be kept constant during the experiment to avoid their effect on the results. These variables are the same in the control and all the experimental groups, so they can not influence the results.
In the exposed example,
Question ⇒ how does the amount of water given to these plants each day affect how tall the plants grow?
1) Hypothesis ⇒ If the plant receives the same amount of water every day, it will grow taller than plants that receive different daily amounts of water.
2) Controlled variables ⇒ soil pH, temperature, light exposure
3) Measurement tool ⇒ millimeter ruler
This tool is useful to measure the change in tall plants daily. Being millimetric helps the researcher get a more accurate measure of the plant changes in height during the whole experiment.
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Please answer ,it’s due tomorrow!
After an experiment, Monica creates a graph that chose a direct linear relationship between the size of a fish and the amount of oxygen the fish uses. Describe this trend, in terms of the amount of oxygen that a fish would use, as it grows from being very small to very large.
Based o Monica's linear graph, the growth of the fish means more demand for oxygen.
How does an increase in body size affect the demand for nutrients by living organisms?An increase in body size increases the demand for nutrients in living organisms.
This is because an increase in the size of organisms or growth results in an increase in the number of cells, and the needs of each cell also increase.
Thus, for the direct linear relationship between the size of a fish and the amount of oxygen the fish uses, the demand for oxygen for the fish will increase with the increase in the size of the fish.
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