A cross-sectional view of a log shows a concentric pattern. Which part of the stem gives rise to this pattern?
B. Xylem
as it contribute for most of a tree's growth in diameter.
When observing a group of children at a daycare center, Emily made the following observations:
Five year old children played in one location during independent play time. Three year old children moved between different activities, rather than staying in one location.
By analyzing Emily’s observations, what could be a valid conclusion?
a.
Five-year-old children have longer attention spans than three-year-old children.
b.
Three year old children do not like being in daycare.
c.
Five-year-old children are favored over three-year-old children at the daycare center.
d.
Three-year-old children are favored over five-year-old children at the daycare center.
Answer:
the answer is a
Explanation:
you can read twice. it show the 5 year emily have longer attention. thay why he see 3 year children go around
Answer please..... I'll be very grateful to you
Which is a function of the cell membrane? performs photosynthesis controls what enters and leaves the cell produces proteins provides energy to the cell
Answer: controls what enters and leaves the cell
Explanation: it is a barrier keeping the constituents of the cell in and unwanted substansces out and is also a gate allowing transport into the cell of essential nutirnts and movement from cell of waste products.
The cell membrane is also referred to as the plasma membrane or cytoplasmic membrane of the cell. It lays various functions in the cell.
The correct answer is:
Option B. controls what enters and leaves the cell
Role of the cell membrane are:
The cell membrane is a biological membrane, which separates the interior of the cell from the external environment. The cell membrane is selectively permeable such that it allows certain molecules to pass through them. The cell membrane controls the entry and exiting of molecules from the cell.
Thus, the correct answer is Option B.
To know more about cell membrane, refer to the following link:
https://brainly.com/question/17254662
Al wonders if adding salt to water will affect how long it takes the water to freeze. Al thinks that salt water will freeze more quickly than fresh water. He decides to check his hypothesis by conducting an experiment. Al takes two ice trays and fills one with distilled water and the other with distilled water that has two tablespoons of salt added. He makes sure he puts exactly the same amount of water in each ice tray. Al takes the trays and puts them side by side in the freezer. Al checks the ice trays every 10 minutes to see if the water in each tray has begun to freeze. Al finds that after 20 minutes the water in the ice tray without the salt has started to form ice, while the ice tray with the salt water is still completely liquid.
What is his hypothesis?
a. Salt water freezes slower than fresh water.
b. Water freezes in a freezer
c. Salt water freezes faster than fresh water.
d. water will freeze in 20 minutes
salt water freezes slower than fresh water
if your results support the hypothesis when it becomes
The linear strands of DNA in eukaryotes are efficiently packed within the nucleus of the cell. The packing of DNA strands is mediated by proteins called
Answer: Chromatin.
Hi! The answer you're looking for is chromatin.
Chromatin helps to organize DNA into the strands you're talking about, which are called nucleosomes.
Glad to help!
1. Discuss at least two attributes of a study that you would look for to determine whether or not it is rigorous.
Some of the aspects that help you determine whether a study is rigorous are questions and hypotheses that can be answered, adequated method use, and bibliography.
Rigorous is a term that refers to a quality that focuses on accuracy and precision to comply with norms, precepts, and pre-established rules. This term is widely used in science to refer to the precision of a study or investigation.
Therefore, when it is established that a study is rigorous, its attributes must be taken into account, such as:
- Questions and hypotheses that can be answered: This aspect refers to the investigator having the ability to limit his study so that it is appropriate to do so and does not include too much information that makes his study "impossible".
- Adequated methods use: This refers to using the appropriate methods to reach feasible conclusions, for example, methods of observation, deduction, induction, among others.
- Bibliography: This refers to the research or study being supported by reliable sources so that it is as accurate as the information it provides.
Learn more in: https://brainly.com/question/14617975
Which term best describes the difference in colors of the birds below? 4 birds are shown. One has light brown feathers with darker wings. One has very dark feathers with lighter wings. Another has medium brown feathers with light wings. The last one has medium brown feathers with very dark wings. natural selection reproductive maturity genetic variation genetic drift Mark this and return
Answer:
genetic variation
Explanation:
Genetic variation refers to the difference in genetic content of organisms within a population. The genetic makeup of living organisms are made up of GENES, which exists in contrasting pairs called ALLELES. Each allele is responsible for variation in traits exhibited by the organisms. Differences in the allelic content of organisms of the same species leading to the display of varying phenotypic characteristics is referred to as GENETIC VARIATION.
This is the case in the example given in which four birds in a population possess a range of wing and feather colors i.e light brown feathers with darker wings, dark feathers with lighter wings, medium brown feathers with light wings, and medium brown feathers with very dark wings, all resulting from a variation in their genetic content. Hence, this is an example of GENETIC VARIATION.
Answer: C. Genetic variation
Explanation: :)
Which sentence about protist is accurate
Answer:
there are no sentences
Explanation:
what type of rocks form from decaying plants
Answer:
Types of rocks are three types in :- metamorphic, igneous and sedimentary rocks, these are rocks formed dirt,soil and organic matter.
Explanation:
Sedimentary rocks are is known to plant contain animal fossils, there is a high level of animals and plant they develop layer of rock fuel include oil natural gas.
Sedimentary rock due to the consist addition of new particles by the water and erosion,basins found on to the earth fore arc and back arc basins.
Coal is the type of sedimentary rock that is plant and dead animals or organic matter,long period under time right conditions.
Sedimentary rock is different type carbonate, coal, chemically performed carbonate rock several kind of chalk and carbonate minerals.
Metamorphic and igneous rocks are abundant and they the most of rocks are on the earth actually are sedimentary rock,an animal and plant refuse one location and settle there soil and organic matter decaying animals.
Answer:
Organic sedimentary rocks form from decaying plants. Over time, organic matter from decaying plants and animals is pressed together and compacted to rocks.
Explanation:
The ostrich is a bird. However, it has traits that are different from those of the birds we typically see flying around our neighborhoods. Using credible sources, investigate the environment and adaptations of ostriches to explain how they evolved to survive in their environment.
Answer:
According to National Geographic, ostriches are a part of a very small group of birds that cannot fly because unlike most birds, their small wings are not strong enough to carry their body for flight and their breastbone isn't balanced enough for flying. Birds that are unable to fly are called ratites.
A number of scientists namely Thomas Huxley, Richard Owen, and others have tried to show that these ratites are actually related to each other and eventually, it was discovered that they all had one thing in common, the way the bones at the roof of the mouth were arranged was similar to that of reptiles rather than other birds.
Richard Owen found and assembled the remains of an extinct ostrich skeleton which was an extinct moa and contrary to already held opinion, one ratite known as tinamous did not really fit with the profile of a ratite because it could fly, even though almost grudgingly and they possessed keeled sternum which suggests that they evolved from flying birds.
DNA tests showed that tinamous evolved within ratites and not necessarily as a separate entity. The tests also showed that moas and tinamous are related.
It was also speculated that the division of the supercontinent Pangaea southern side led to the separation of flightless ratite ancestors, causing each landlocked group to evolve and become the flightless birds we know today such as the ostrich, rheas, etc.
Answer:
An ostrich is an extremely large bird that lives in Africa. It can’t fly, but it has powerful legs that allow it to outrun most predators. Its flexible knees and two-toed feet enable it to run easily. An ostrich has strong leg muscles that it can use to kick large predators. It has claws on its wings to defend itself from predators and thick feathers to keep it warm at night. Ostriches have thick eyelids that protect their eyes from sandstorms.
Explanation:
1. Bacteria after transduction contains :
a) Enhance supply of ATP
b) Numerous new plasmids
c) Fewer DNA segments than it originally had
d) New DNA segments
D
Explanation:
transduction is the process by which forging DNA is introduce into a cell by virus or viral Vector ,so bacteria after transduction contains new DAN segment
Which is one of the bases found in DNA?
O A. Serine
O B. Leucine
O C. Lysine
O D. Cytosine
Answer:
D. Cytosine
Explanation:
The bases of the DNA(a material found in the Nucleus that contains genetic information) are four in number.
ACGT:
An acronym that stands for
A= Adenine
C= Cytosine
G= Guanine
T= Thymine
Hope this helps ;) ❤❤❤
Cytosine is the base which presents in the DNA. Therefore, option "D" is correct.
What is nucleotide base pairing?There are five types of nucleotide bases adenine, cytosine, guanine, thymidine, and uracil. These divide into two classes of nucleotides pyrimidine and purine nucleotide bases. Pyrimidines are uracil, thymine, and cytosine whereas adenine and guanine are purines.
DNA consists of adenine, cytosine, guanine, and thymidine. In RNA, adenine, cytosine, and guanine are present but thymine is replaced by uracil.
Pyrimidine always binds with the purines through hydrogen bonding. Adenine binds with thymine. Cytosine binds with guanine. But when adenine pairs with uracil in RNA.
Therefore, these four bases are basic units of DNA.
Learn more nucleotide base pairing, here:
https://brainly.com/question/15900878
#SPJ7
AZT is a reverse transcriptase inhibitor. How does this drug prevent the replication of a retrovirus
Answer:
AZT is a thymidine analog
Explanation:
Azidothymidine (AZT) is an antiviral drug used for the treatment of the Human immunodeficiency virus infection (HIV/AIDS) by preventing the transmission of HIV from infected cells. AZT is capable of suppressing the activity of the enzyme reverse transcriptase of the retroviral HIV genome, which enables it to copy RNA into DNA. In infected cells, this double-stranded DNA is integrated into the host genome which is then instructed to produce identical HIV copies. AZT is a thymidine analog that is incorporated into DNA and thus interferes with DNA synthesis, thereby inhibiting cell proliferation.
The authors constructed a phylogenetic tree using nucleotide substitutions as well as a tree built using indel information. What relationships did each support; do they agree completely with each other
Answer:
Both types of genetic data can be used to generate evolutionary trees, but indels increase phylogenetic resolution
Explanation:
Nucleotide substitutions, also known as single nucleotide polymorphisms (SNPs), are genetic changes at specific positions in the genome that can be used to compare two or more sequences through a local alignment. SNPs enable to estimate the evolutionary distances among sequences and they are the most common type of genetic variation used to draw phylogenetic trees. On the there hand, sequence insertions and deletions, collectively referred to as indels, can increase the resolution of an evolutionary tree because this type of variation is less frequent in the population (i..e., indels generally have higher deleterious effects than SNPs). However, it is important to note that, in the case of indels, it is imperative to include more complex alignment algorithms in order to analyze data derived from this type of genetic variation.
During a University of Nevada, Reno blood donation campaign, the frequencies of alleles determining the ABO blood groups were determined to be 0.70 for IO, 0.2 for IA and 0.1 for IB. Assuming random mating, what is the expected frequency of blood type O?
Answer:
The expected frequency of blood type O is 0.49
Explanation: Due to some technical problems, you will find the complete answer and explanation
Choose only one correct option. Explanation needed.
Answer: D
only green plants
Answer:
[tex]\large \boxed{\mathrm{D. \ Photosynthesis}}[/tex]
Explanation:
Photosynthesis is a characteristic present in plants. Photosynthesis is a process where plants transform light energy into chemical energy. Reproduction, respiration, and excretion are all characteristics of living organisms.
What causes potential energy that accumulates in a fault to transfer to the surface during an earthquake? A. refraction B. Triangulation C. Seismic waves D. Lithostatic pressure
Answer: C.
Explanation: Seismic waves causes potential energy that accumulates in a fault to transfer to the surface during an earthquake.
Seismic waves cause potential energy that accumulates in a fault to transfer to the surface during an earthquake. So, the correct option is C.
What are Seismic waves?A seismic wave is defined as a wave of acoustic energy that travels through the Earth or any other planetary body that can be generated by an earthquake, volcanic eruption, magma movement, a large landslide, and a large man-made explosion that produces low frequency acoustics energy.
There are three basic types of seismic waves which are as follows:
P-wavesS-waves Surface waves.P-waves and S-waves are sometimes collectively referred to as body waves.
Thus, Seismic waves cause potential energy that accumulates in a fault to transfer to the surface during an earthquake. So, the correct option is C.
Learn more about Seismic waves, here:
https://brainly.com/question/13062627
#SPJ6
Pleaseeeee help me. When a rabbit eats a plant, nutrients from the
plant become available to the tissues of the
rabbit. During this process, some of the energy
from these nutrients is lost and the energy
becomes heat and unavailable chemical energy.
This energy loss partly explains why the total
energy is greater in
A. predator populations than in scavenger
populations.
B.consumer populations than in producer
populations.
C. producer populations than in consumer
populations.
D. predator populations than in prey populations,
Answer:
C.
Explanation:
Answer:
C.
Explanation:
total energy is greater in producer populations than in consumer populations
environmental influence on gene regulation
Answer: You can consult:
Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal's genes are expressed, which ultimately affects the animal's phenotype.
Explanation:
I'm not sure but hope it helps.
.1.2 The type of control shown in the diagram is known as
Answer:
which diagram
Explanation:
I hope you understand
Under normal conditions glomerular filtration depends on three main pressures. What pressures is a pressure that favors the process of filtration?
Answer:
Glomerular Hydrostatic pressure .
Explanation:
The basic function of the kidney is the formation of urine for elimination through the urinary excretory system. Two different processes determine this formation: the filtration of fluid through the glomerular capillaries into Bowman's space and the modification of the volume and composition of the glomerular filtrate in the renal tubules. The fluid passes from the glomerular capillaries to Bowman's capsule due to the existence of a pressure gradient between these two areas. This process is favored by two structural characteristics that make renal corpuscles particularly effective filtration membranes: glomerular capillaries have a much higher number of pores than other capillaries, and the efferent arteriole has a smaller diameter than the afferent arteriole, causing greater resistance to outflow of blood flow from the glomerulus and increasing glomerular hydrostatic pressure. Increased glomerular hydrostatic pressure (due to increased blood flow through the glomerulus) increases filtration, while increases in Bowman's hydrostatic pressure or urinary space (which remains constant, unless there is disease at that level, usually due to fibrosis) and plasma P. oncotic (determined by proteins, which tend to "drag" plasma into the glomerulus) decrease filtering. Resulting in a filtering pressure of 10 mmHg.
Which of the following is true about oncogenes
Answer:
genes involved in the cell cycle following a mutation become oncogenes.
hello guys, Define wave length.I think this will be easy for u guys good day thank u
Answer:
the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
Explanation:
Please tell me if it helps
basic question for fun . HOW TO FIGHT WITH TYPES OF VIRUS IN THE WORLD AND HOW GET RID FROM IT EXAMPLES: CORONA VIRUS, INFLUENZA, TYPHOID, HEPHATITISAND CHLOREA?
Answer:
Boost immunity power( follow these):
1. Have enougn sleep.
2. Be happy...overcome stress.
3.Do exercises frequently.
4. Have regular check ups ;these may help to diagnosis on early stage.
5. Consume the foods which boosts immunity.
6. Be mentally strong.
Explanation:
There isn't proved ideas ...however, we can fight by making our immune system strong...
HIT LIKE
In the box provided explain why living organisms contain more hydrogen atoms than any other atoms yet 65% of a typical organisms mass is oxygen
Answer:
The prime reason for this is that an atom of oxygen comprises sixteen times more mass in comparison to a hydrogen atom.
Explanation:
This means that A orginasim will appear to contain more oxygen, but the size diffrence will mean that there will be more hydrogen, just of a smaller size with less mass, thus making up a lesser part of the organism in terms of mass, but the majority on the molecular level.
Answer:
Reason 1: The mass of Oxygen is 16 times that of Hydrogen. Hydrogen takes 16 atoms to equal the mass of 1 Oxygen atom.
Reason 2: A large portion of an organism’s mass is in the form of water. Water contains two hydrogen atoms and one oxygen atom.
Explanation:
I just took the test
RNA thường bắt đầu bằng base nào
Answer:
Xin lỗi vì bản dịch xấu. Nó được tạo thành từ các căn cứ adenine, cytosine, guanine và uracil.
Explanation:
So với RNA, DNA có thymine thay vì uracil trong một phân tử di truyền polymer.
Drag each tile to the correct box. Place the items in order from lowest to highest degree of internal organization. Please answer 1st at the top and last at the botttom
Answer:
Lowest to highest degree of internal organization form the given items are:
1) Digestive system: Digestive system is a type of organ system, which is consist of several digestive organs such as mouth, stomach, pancrease and intestine.
2) Stomach: Stomach is a type of organn which is a functional group of tissues.
3) Stomach lining tissues: These are functional group of cells.
4) Epithelial stomach cell: cell is a basic unit of all life.
Hence, the correct order form loowest to highest degree of internal organization is:
Digestive system => Stomach => Stomach lining tissues => Epithelial stomach cell
The basal side of epithelium is always connected to?
A) basement membranes
B) connective tissue
C) epithelial cells
D) blood vessels
Answer:
Basement membranes
Explanation:
A graduate student studying biology at the University of Nebraska has identified a new species of spider found only in Eastern Nebraska around Omaha. The graduate student determines that the spider has six homologous pairs of chromosomes. How many chromosomes would a cell in that spider have during metaphase of mitosis?
Answer:
12 chromosomes
Explanation:
Mitosis is a type of cell division that involves the formation of two genetically identical daughter cells. The two daughter cells are genetically identical in the sense that they contain the same number of chromosomes as the parent cell. Mitosis involves four stages namely: Prophase, Metaphase, Anaphase and Telophase.
In the metaphase stage as stated in this question, homologous chromosomes align at the equator of the cell called cell plate, before each chromatids are pulled apart by microtubules at the Anaphase stage.
According to the question, the spider being worked on has 6 pairs of chromosomes, which will align at the cell's equator during metaphase stage of mitosis. Since the replicated chromosomes (chromatids) are yet to separate to opposite poles of the cell, the cell will still contain 12 chromosomes at the metaphase stage.
N.B: Each chromosome contains 2 chromatids or replicated chromosome, which will be separated at the Anaphase stage. Each chromatid will be an individual chromosome after cytokinesis.