Why must DNA replicate

1 answer:

5 0

Because in each cell we have, we need a portion of our dna, so when our body replicates cells, our dna needs to be a direct copy of each cell, unless, it would be called a mutation

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Discuss the major functions of the lymphatic system

Agata [3.3K]

The major functions of the lymphatic system include:

1. removing interstitial fluid from tissues

2. absorbs/transports fatty acids

3. transports white blood cells to and from lymph nodes into the bones

4. Transports antigen cells to the lymph nodes where the immune response is activated.

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3 years ago

The specific valve that prevents backflow of blood into the right ventricle when the ventricles relax is the ______________ valv

kaheart [24]

Pulmonary valve - connects right ventricle and pulmonary trunk (which divides into right and left pulmonary arteries). It is a semilunar valve

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4 years ago

Which substances are most used as building blocks of in the synthesis of lipids

swat32

Fatty acids

Explanation:

Fatty acids are the building blocks in the synthesis of lipids. Lipids are built on repeating fatty acids units.

Many esters occurs naturally in plants and animals.
Such as fats and oils, waxes, phospholipids and glycolipids.
These groups of compound are called lipids.
Fatty acids are alkanoic acids and when they combine with alkanals produce esters.
They are made up of the carboxylic acid functional group.

Learn more:

lipids brainly.com/question/5094081

#learnwithBrainly

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3 years ago

Instructions: Using what you have learned in the lesson and additional research, describe how the theory of evolution is support

olya-2409 [2.1K]

Answer:

fossils depict how our bones have changed from past year to today.

Explanation:

for example, wisdom teeth were use to eat raw meat and crush bones as shown in fossils like Lucy. Another example would be extinct animals preserved, they were not able to survive and adapt to the earths changing conditions.

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3 years ago

Two different scientists were studying the carbon levels of the air above a large city. They both found that the levels had incr

ss7ja [257]

Answer:

Scientist 1

Explanation:

The conclusion of scientists 1 is valid.

Human activities such as burning of fossil fuels, agriculture, deforestation, etc. leads to the emission of carbon in the form of carbon dioxide into the atmosphere. An increase in the population of a city will only lead to an increase in these activities and hence, an increase in the amount of carbon emitted into the atmosphere.

Also, volcanic activities leads to the production of volcanic gases which is a mixture of carbon dioxide, oxides of sulfur, nitrogen, etc.

However, an active volcano that is several miles away from the city might not be a major source of carbon in the air above a large city. The carbon dioxide produced from such volcanic activity thins out before reaching the city.

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3 years ago