Answer:
the cell membrane is an extremely pliable structure composed primarily of back -to- back phospholipids (a "bilayer")
Which form of hypoxia reflects poor O2 delivery resulting from too few RBCs or from RBCs that contain abnormal or too little hemoglobin?
a. hypoxemic hypoxia
b. ischemic (stagnant) hypoxia
c. anemic hypoxiad. histotoxic hypoxia
Answer:
c. Anemic hypoxia
Explanation:
Hypoxia is a health condition in which the body or a region of the body is not adequately supply with oxygen at the tissue level. Types of hypoxia include:
Hypoxemic hypoxia is a condition in which their is low level of oxygen in blood in the arteries due to the inability of the lungs to properly oxygenate blood.
Ischemic (stagnant) hypoxia is a type of hypoxia that occurs due to a decrease in blood flow preventing adequate blood supply to tissues.
Anemic hypoxia occurs when the ability of the blood to carry oxyegen is reduced due fewer red blood cells or red blood cells that contain little or abnormal hemoglobin molecules hemoglobin molecules.
Histotoxic hypoxia is hypoxia in which the cells are unable to use oxygen from the bloodstream, even though there is normal delivery of oxygen to such cells and tissues. This is due to the poisoning of the cells or tissues causing a disruption in their respiratory mechanism, for example in Cyanide poisoning.
Therefore, the correct answer is anemic hypoxia.
what is meaning of H2O and compound
Explanation:
H2O is water and compound is an opposite of elements
Please help me...will give braniliest
Lisa is working on a science project. Her task is to
answer the question: "Does fluoride (which is a
commercial hair product) prevent cavities?". Her
family is willing to volunteer for the experiment.
11. Describe how Lisa would perform this experiment. Identify the control group, and the independent variables in your description
Answer:
The fluoride is what helps you avoid cavities
Explanation:
water fluoridation as safe and effective in preventing tooth decay for both children and adults
PLEASE ANSWER QUICKLY Which statement about cell theory is INCORRECT? New cells are spontaneously created from existing cells. All organisms are composed of one or more cells. Cells are the basic unit of life and structure. New cells are created from existing cells.
Answer:
New cells are spontaneously created from existing cells
Explanation:
In the 1830's, three scientists namely: Matthias Schleiden (a botanist), Theodor Schwann (a zoologist) and Rudolf Virchow proposed the Unified cell theory. In this theory, three parts were universally accepted and they are as follows:
1) Cells are the fundamental and basic unit of all life and structure.
2) All living organisms are made up of one or more of these cells.
3) New cells arise from already pre-existing cells.
These three parts are the widely accepted parts of the cell theory. Although, it was once believed that new cells arose from inorganic matter. This theory, called spontaneous generation or abiogenesis was later disapproved.
Therefore, the statement that, "new cells are spontaneously created from existing cells" is not a part of the CELL THEORY.
A research biologist is studying cells from a new organism recently discovered in the Brazilian rainforest. She determines that the somates contain a total of 10 chromosomes. How many possible combinations of chromosomes could this organism produce as a result of independent assortment
Answer:
32 possible combination of chromosome
Explanation:
According to the law of independent assortment as proposed by Mendel, alleles of a gene will separate into gamete independently of the alleles of another gene. Since this organism contains 10 chromosomes in its somatic cell, it will undergo meiosis to produce half number of chromosomes in its gametes i.e. 5 chromosomes.
If we know the haploid number of chromosomes of an organism i.e. n, we can calculate the possible combination of chromosomes that will be present in its gametes as a result of independent assortment during meiosis using the formula:
2^n, where n= haploid no. of chromosome
If n is 5 chromosome in this case, the possible combination of chromosome in its gametes will be 2^5 = 32. Hence, as a result of independent assortment, an organism with 10 chromosome in its somatic cell will produce 32 possible combinations of chromosome in its gametes.
the results of an experiment can be validated through replication true or false
Answer:
True through replication
Answer:
this is true
Explanation:
A doctor suspects that one of her patients has a deficiency in one of the six key elements found in living organisms. He has low energy and extremely weak, soft bones. Based on this information alone, which nutrient supplement will she most likely prescribe? phosphorus zinc sodium sulfur
Answer:
The answer is: phosphorus
Which is a natural factor that causes long-term climate change?
Answer: volcanic eruption and solar variation
Explanation: Hope that helped you out!
Find some applications of
nanotechnology in medical care and disease prevention.
Answer:
Preventing illnesses, more quickly diagnose, control diseases, treat diseases with fewer side effects, and create better medical aids such as more compatible prosthetics.
What is the function of the nucleus? A. Builds proteins B. Stores the cell's glucose C. Stores the cell's DNA D. Produces energy for the cell by respiration
[tex] \large{ \boxed{ \bf{ \pink{Stores \: the \: cell \: DNA(C)}}}}[/tex]
Nucleus is the control centre of the cell and manages all the cellular activities taking place inside the cell. It consists of four parts :-
Nuclear membrane, Nucleoplasm, Chromatin material and Nucleolus.The Chromatin material(Condensed - Chromosome) stores the cell's DNA which is transmitted to next generation.
Based on fossilized evidence, there are scientific claims made about the evolution of certain species. If a scientist studying the fossils of a specific species had a hypothesis other than what was currently accepted, what steps should be taken to have the alternative hypothesis considered
Answer: For the scientist to have alternative hypothesis considered, it is imperative he takes certain steps, this steps will ascertain the scientific claims already made about the evolution of species.
Therefore,the scientist will simply test the alternative hypotheses inorder to know that they are incorrect.
This testing of hypotheses to ascertain their incorrectness is very useful in the study of fossils.
Explain why when you exercise your heart rate change?
(less than 20 words)
Answer:
when you are exercising the muscles need extra oxygen,for this oxygen to be supplied quick the heart pumps faster which makes a quicker pulse.
I hope this helps
Answer:
During exercise, your body may need three or four times your normal cardiac output, because your muscles need more oxygen when you exert yourself. During exercise, your heart typically beats faster so that more blood gets out to your body.Your heart can also increase its stroke volume by pumping more forcefully or increasing the amount of blood that fills the left ventricle before it pumps. Generally speaking, your heart beats both faster and stronger to increase cardiac output during exercise.
In science when writing an explanation what must include
Answer:
Our scientific explanation framework consists of four components: (1) claim, (2) evidence, (3) reasoning,1 and (4) rebuttal.
Explanation
hormones in the bloodstream
Answer:
insulin
Explanation:
Answer:
chemical messenger.
Explanation:
emily wants to know how green, blue and red color light affects plant growth compared to natural light. (Hint: what light affects the plant the most) Form hypothesis and design an experiment. Make sure identify the control, independent (manipulated) variable and dependent (responding) variable. Be detailed
Red and blue colored lights are most effective for plant growth.
Plant Growth is the dependent variable and light color is the independent variable. The rest are control variables.
A Control variable is the part of the experiment that we keep the same throughout all of the test subjects. An independent variable does not depend on other variables and a dependent variable does.
Allow me to explain. When we perform an experiment, many factors that can change the results, For this reason, it is common practice to keep many of them the same for all test subjects (In this case for all of the plants). This way we know that if changes are measured, they were not caused by these variables. These are what we call control variables.
An independent variable does not depend on other variables to remain the same. For example, the species of plant would be an independent variable, given that a plant cannot change its species because of other factors.
A dependent variable does change according to other variables and is often what we try to measure. For this example given, the dependent variable is how much the plant will grow with each colored light.
Knowing that plants rely on light to produce the energy needed to grow, we can hypothesize that applying different colors of light will have an effect on plant growth. To test this, we can create an experiment where we use:
Soilamount of wateramount of lightspecies of plantlength of experimentAs control variables.
One group of plants will have blue light, another green, and another red. We can identify the color of light as an independent variable.
Since what we seek to measure is plant growth, we identify this as our dependent variable and measure it for each plant after a set amount of time, to compare results.
With this, you can confidently identify the control, dependent, and independent variables and how to use them in your experiment.
To learn more about experiments try: https://brainly.com/question/17314369?referrer=searchResults
For each of the following types of transcriptional control, indicate whether the protein produced by the regulator gene will be synthesized initially as an active repressor, inactive repressor, active activator, or inactive activator.a. Negative control in a repressible operonb.b. Positive control in a repressible operonc.c. Negative control in an inducible operond.d. Positive control in an inducible operon
Answer:
The type of protein synthesized for each case of transcriptional control is given below:
a. Negative control in a repressible operon
Inactive repressor
b. Positive control in a repressible operon
Active activator
c. Negative control in an inducible operon
Active repressor
d. Positive control in an inducible operon
Inactive activator
Explanation:
Different types of operons exist in different bacterial systems and they control the transcription of genes by means of regulator proteins. These proteins are responsible for turning on or off the gene encoding a particuar protein depending on whether or not the cell requires for it.
A mutation in human ATPase 6, which corresponds to E. coli subunit a, from leucine to arginine at position 156 may allow the movement of protons across the membrane, but not the rotation of the ring of c subunits. How might this possible mechanism affect the function of ATP synthase
Answer:
H+ protons will not be delivered from the cytoplasm towards the extracellular side of the cell membrane
Explanation:
ATP synthases are enzymes that catalyze the hydrolysis of phosphate bonds in the adenosine triphosphate (ATP) or the formation of ATP from adenosine diphosphate (ADP) and phosphate. The hydrolysis of ATP produces the rotation of a ring composed of six or more structurally different ATPase C subunits. The rotation of this ring enables the delivery of H+ protons towards the extracellular membrane surface and this gradient is used to generate energy by producing ATP. In consequence, when the ATPase ring can not move, H+ will accumulate in the cytoplasm, the proton gradient through the membrane will not occur, and ATP will not be produced.
what process takes place at the boundary between the capillaries and the alveoli?
Answer:
Carbon dioxide enters the alveoli, and oxygen enters the capillaries.
Explanation:
This describes the exchange of gases in the lungs. When blood from the rest of the body gets to the lungs through the capillaries, oxygen flows from the alveoli which are tiny air sacs in the lungs, into the blood in the capillaries.
Carbon dioxide from the blood brought to the lungs will then flow into the alveoli which will then expel it through the nose. This repeated process ensures that the body keeps getting oxygen and expelling carbon dioxide.
Answer:
Exchange of Gas takes place in lungs between the alveoli and capillaries which are tiny blood vessels, placed at the walls of alveoli. The rate of diffusion depends on the thickness of the biological membrane which forms the boundary between the external environment and organisms.
Explanation:
Hope it helps
have a good day
In your opinion, how do you think Lamarck's ideas were taken? justifies
Answer:
they considered valid but a certain idea of acquired characteristics being inherited was rejected
Explanation:
his theory was that if the environment demanded a need or use of a structure in an organism it developed it in response to demand leading to natural use or disuse of structures which he said that these new structures would be passed to their offspring leading to emergence of a new species. scientists accepted that the environment has a role in directing phenotypic changes in an individual taking a body builder for example since his muscles will become huge due to continuous use of the muscles in exercises
but scientists rejected his theory of these acquired characteristics were inherited since phenotypically acquired characteristics that do not affect the genotype of an individual can't be inherited
Consider a system in which low levels of protein "Q" triggers production of hormone A. The reaction of target cells of hormone A is to produce and release hormone B, which stimulates production of hormone C. In response to hormone C, the target cells up-regulate protein Q. In this scenario we see an example of _____.
Answer:
Negative feedback
Explanation:
Negative feedback is produced when a mechanism is amplified through an inverse loop, which tends to reduce the fluctuations in the system. In this case, the negative feedback mechanism represents a homeostatic response of the body where the release of a target hormone (hormone C) decreases in response to the increase of a protein (protein Q) upstream in the signaling pathway. Therefore, in this scenario, it is expected that negative feedback causes a decrease in hormone function.
please answer the question below
Answer:
B. The pea flowers are pollinated at random.
Explanation:
Hardy-Weinberg equilibrium states that allele and genotype frequencies will remain same in next generations without any evolutionary influence among a population.
If the pea flowers are pollinated at random, then the population will not follow Hardy-Weinberg equilibrium because random pollination give rise to variation among the population as flower will pollinate randomly and allele and genotype frequencies varies showing both tall and recessive alleles.
Hence, the correct answer is "B".
Answer:
One pea plant pollinates more flowers than the others
Which type of protein will fight disease?
insulin
antibodies
ligaments
genes
Answer: antibodies
Explanation:
Discuss how the idea of vertical farming reflects the role of science in society.
Answer:
average global food prices have gone up by 2.6 percent annually in the past two decades. if that trend continues , not only does it threaten a baseline quality of life as more disposable income goes toward.Vertical farming is the practice of growing local crops like fruits and vegetables with minimal resources by using high technological methods in a controlled environment.
Why vertical farming is important?It has been said to be the future of agriculture in the UAE since they huge amount of goods and have to find ways to be self sustaining by boosting local production. Apart from being self sustaining, they also aim to provide safe and nutritious food.
The vertical garden is an agriculture concept for growing plants inside buildings or multi-story skyscrapers, often called farmscrapers, a term derived from the English skyscraper. In these buildings, which would function as large greenhouses, agriculture involves the use of technologies such as hydroponics to aid in plant growth. Some projects include the practice of livestock (especially poultry) on the lower floors.
Therefore, Vertical farming is the practice of growing local crops like fruits and vegetables with minimal resources by using high technological methods in a controlled environment.
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Los cuyes del pelo crespo, al ser cruzados con cuyes de pelo liso, producen solamente cuyes de pelo crespo, si se cruza uno de los cuyes de pelo crespo de F1 con el homocigoto recesivo. ¿Qué proporciones es posible esperar
Answer and Explanation:
Datos:
El alelo dominante del gen que codifica para el tipo de pelo, determina el pelo crespo. Llamemos P al alelo dominante. Genotipos que expresan pelo crespo: PP (Homocigota dominante) y Pp (Heterocigota)El alelo recesivo del gen que codifica para el tipo de pelo determina el pelo liso. p es el alelo recesivo.Genotipo homocigota recesivo, pp, expresa pelo liso.La cruza entre un cuy de pelo crespo y un cuy de pelo liso producen solo cuyes de pelo crespo. Esto implica que el parental con pelo crespo era homocigota dominante.1º Cruza: un cuy de pelo crespo y un cuy de pelo liso
Parental) PP x pp
Gametas) P P p p
Cuadro de Punnet) P P
p Pp Pp
p Pp Pp
F1) 100 % de la progenie posee pelo crespo
4/4 tienen genotipo heterocigoto.
2º Cruza: un cuy heterocigoto de la F1 y un cuy homocigoto recesivo
Parental) Pp x pp
Gametas) P p p p
Cuadro de Punnet) P p
p Pp pp
p Pp pp
F2) 50% de la progenie tiene pelo crespo
50% de la progenie tiene pelo liso
2/4=1/2 de la progenie es heterocigota
2/4 = 1/2 de la progenie es homocigota recesiva.
During the 1950s, a scientist named Lysenko tried to solve the food shortages in the Soviet Union by breeding wheat that could grow in Siberia. He theorized that if individual wheat plants were exposed to cold, they would develop additional cold tolerance and pass it to their offspring. Based on the ideas of artificial and natural selection, do you think this project worked as planned
Answer:
No
Explanation:
Trofim Lysenko was a Biologist in the then Soviet Union, who did not believe in the fundamental laws of science. Selective breeding is the method developed by humans to change certain characteristics of species to desired outcomes. This is based on the fact that living things have inheritable traits encoded in genes that can be passed from one generation to another.
Lysenko did not believe in this fact. He rather believed that when exposed to the right environment, plants and animals soon become adjusted to the exposure and can then develop traits that would be passed on to their offsprings. He applied this theory of his when he exposed wheat plants to cold believing that they would develop tolerance to cold. This failed woefully and resulted in severe starvation that caused the death of millions of people in the Soviet Union.
Which of the following terms is a comparison between the number of copies
of a particular allele and the number of copies of that gene?
A. Allele dominance
B. Allele frequency
C. Allele density
O D. Allele strength
SUBMIT
Answer:
A: Allele Dominance
Explanation:
Which of the following is not a negative consequence of upward urban growth?
a pollution
b creation of a "heat island"
C. increased use of surrounding land
d. waste management issues
Please select the best answer from the choices provided
A
OOOO
Answer: I believe its C
Explanation:
Answer:
C. increased use of surrounding land
Explanation:
Edge2021
Which compound is produced during regeneration? PGA G3P RuBP rubisco
Answer:
RuBP is the answers
Answer:
C) RuBP is the answer on edge.
Explanation:
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What type of muscle is specialized for rapid and forceful contraction of short duration ?
Select one
a. Skeletal muscle
b. Smooth muscle
c. Cardiac muscle