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Answer:

its B because veins bring the blood back to the heart for reoxidation

Answer:

For questions that were left blank:

1) Arteries carry blood away from the heart while veins carry blood into the heart.

Ans: a

2) The heart has 2 pumps. The pulmonary circuit pumps blood to the lungs and the systemic circuit pumps blood to the body.

Ans: b

Answer:

Tolerance is correct

Explanation:

Answer:

d. Synarthrotic joints  

Explanation:  is correct for the choices offered.

Answer:

A.

Explanation:

Glycolysis produces 4 ATP molecules in total, however 2 ATP molecules are used to convert a glucose molecule into a new 6 carbon compound with 2 phosphates attached to it. So, the net yield of ATP is 2 molecules.

Answer:

A net gain of only 2 ATP

Explanation:

Answer:

Lipids perform three primary biological functions within the body: they serve as structural components of cell membranes, function as energy storehouses, and function as important signaling molecules. The three main types of lipids are triacylglycerols (also called triglycerides), phospholipids, and sterols.

Explanation:

The statement that describes the major role of lipids within a cell is they are the main structural components of membranes. The correct option is D.

Lipids have three main biological activities in the body: they are essential signaling molecules, structural elements of cell membranes, and energy storage facilities.

Triacylglycerols (commonly known as triglycerides), phospholipids, and sterols are the three primary categories of lipids. Fats are subtypes of lipids that are typically composed of glycerol and fatty acid chains.

One sort of lipid, which includes fats, is a group of molecules that don't mix well with water. Hydrophobic, nonpolar, and primarily composed of hydrocarbon chains, lipids have a tendency to be.

Therefore, the correct option is D. They are the main structural components of membranes.

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The question is incomplete. Your most probably complete question is given below:

A. They cause DNA to replicate

B. They move RNA in the cytoplasm.

C. They catalyze chemical reactions in the cell cytoplasm.

D. They are the main structural components of membranes.

Answer:

B: The pace of evolutionary change has slowed down over time, and it only rarely occurs now.

Explanation:

What of the following best explains the pace and timing of evolutionary change The pace of evolutionary change has slowed down over time, and it only rarely occurs now.

Answer:

D: Long periods of stability were punctuated with periods of evolutionary change.

Explanation:

Answer:

cell walls

Explanation:

Cell walls

It provides the cell with both structural support and protection, and also acts as a filtering mechanism. Cell walls are absent in animals but are present in most other eukaryotes including algae, fungi and plants and in most prokaryotes (except mollicute bacteria).

Answer:

Earth history enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes. Such events include: The rise and extinction of the dinosaurs. The formation of the Grand Canyon.

Explanation:

Answer:

Earth history enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes. Such events include: The rise and extinction of the dinosaurs. The formation of the Grand Canyon.

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Explanation:

The three nerves associated with taste are the facial nerve (cranial nerve VII), which provides fibers to the anterior two-thirds of the tongue; the glossopharyngeal nerve (cranial nerve IX), which provides fibers to the posterior third of the tongue; and the vagus nerve (cranial nerve X),

Answer:

all of the above  is correct

Explanation:

Answer:

In these species, members of the group depend completely on one another. Different animals within the group have different jobs. Therefore, group members must work together for the good of all. Most species of ants and bees are highly social animals.

Explanation:

Answer:

in a stable population,the birth and death rates depend directly on the variance of age at death

Answer:

See answer below.

Answer is verified.

Explanation:

Human cells have two sets of DNA in each cell.

And a total of 46 chromosomes in each cell.

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Human cells have two sets of DNA in each cell. Thus, the correct option is A.

DNA stands for Deoxyribonucleic acid. It is considered the genetic material of most organisms. It consists of base pairs like adenine, thymine, guanine, and cytosine.

Human cells have two sets of DNA in each cell, one came from the paternal side while the other came from the maternal side.

Therefore, it is well described above.

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The combination of gametes that will be produced by the Alpha female is Bg, Bg, bg and bg.

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Answer:

Very large molecules such as proteins are too big to move through the cell membrane which is said to be impermeable to them. The type of transport proteins present in a cell membrane determines which substances the membrane is permeable to. CO2 molecules pass directly through phospholipids. Glucose molecules travel through the proteins.

Answer: The main difference between virus and viroids is that a virus is a small infectious agent, which can only replicate inside living cells whereas viroids are the smallest form of infectious agents, which only infect plants.

False- unlike plants fungi to not have chlorophyl.

Why- Fungi do not need the sun to make food instead they break down their own food.

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Answer:

c. Glenohumeral joint

Explanation: is correct (the Shoulder joint)

The major difference in the process of DNA replication between species is the linear order of nucleotides, which can be amplified by PCR. This technique enables the amplification of specific DNA fragments.

The Polymerase chain reaction (PCR) is a technique widely used in molecular biology in order to amplify and thus identify small DNA fragments (approx. 1000 pb).

The PCR uses all materials required to carry out DNA replication: a thermostable DNA polymerase, primers (DNA oligonucleotides), deoxyribonucleotides (ddA, ddG, ddC, or ddT), and template DNA.

The template DNA indicates the linear order of nucleotides that will be added to the amplified DNA fragment, which is highly specific and may vary even between individuals of the same species.

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Answer:

The genome of a cell contains in its DNA sequence the information to make many thousands of different protein and RNA molecules. A cell typically expresses only a fraction of its genes, and the different types of cells in multicellular organisms arise because different sets of genes are expressed.

The genome, which is the second layer, regulates gene access, allowing each cell type to activate its own unique genes while shutting off the majority of the others.

The complete set of DNA instructions present in a cell is known as the genome. The human genome is made up of 23 pairs of chromosomes that are found in the cell's nucleus and one tiny chromosome that is found in the mitochondria.

Everything a person needs to grow and operate is encoded in their genome. The DNA sequence in a cell's genome contains the instructions needed to create tens of thousands of different protein and RNA molecules.

Thus,  in multicellular organisms, distinct cell types develop because diverse sets of genes are expressed, even though a cell normally expresses just a portion of its genes.

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Answer:

The answer is C, from hydrosphere to atmosphere

Answer:

C

Explanation:

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Answer:

b. Tunica media

Explanation:is correct

Answer:

B. Tunica media

Explanation:

Answer:

c

Explanation:

because its the only one that would be hurting wild life.

Using a dam as a source of freshwater can harm wildlife by displacing existing habitats. Therefore, option (C) is correct.

Dams often require the creation of reservoirs, which can submerge large areas of land and alter the natural flow of rivers and streams. This can lead to the loss of important habitats for fish, mammals, and other wildlife that rely on rivers and streams for food, shelter, and reproduction.

In addition, changes in water temperature, dissolved oxygen levels, and water flow can negatively impact aquatic ecosystems downstream from the dam.

These impacts can be mitigated through careful planning and management, such as the creation of fish ladders and other structures to help fish navigate past the dam, and the release of water at appropriate times to mimic natural flow patterns.

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Answer:

b. marijuana is correct

Explanation:

Explanation:

Nestedness is another computational approach that provides a description of groups of webs..

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Answer:

Explanation:

The plant roots containing nitrogen fixing bacteria are

Plants of the Pea Family known as legumes, are some of the most important hosts for nitrogen-fixing bacteria, but a number of other plants can also harbour these helpful bacteria.

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Answer:

ehaviors that help animals or their young survive

Explanation:

increase the animals' fitness. Animals with higher fitness have a better chance of passing their genes on to the next generation. If genes control behaviors that increase fitness, the behaviors become more common in the species.

Answer:

We know that kharif crops such as paddy need more water to grow healthy, which requires in rainy season. But in winter season , which does not requires so much, hence kharif crops cannot grow in this season healthy and properly. Therefore kharif crops cannot be grown in rabi season.

Answer:

Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.