What is the main two reasons why a cell must divide?

Answers

Answer 1

Answer: Here are 3 reasons:

1. Reproduction, because new cells must replace dead and damage cells; for example: blood

2. For growth/tissue repair

3. Creation of eggs or sperm

Hope this helps.

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2. Proteins play a variety of roles within cells, but there are many steps that must be undertaken to make these proteins and deliver them to where they need to go.

Answers

This sentence is true. Proteins are the basic building blocks of our body as they are the core constituents of all the required higher-order structures in our body. For them to get synthesized, we need particular sequences of aminoacids chained together and this process goes on all the time.

Organelles must interact with each other to synthesize and transport proteins.

Rising levels of carbon dioxide most likely

Answers

Answer:

The elevating levels of carbon dioxide most probably can diminish the productivity on the land and the sea. In case, when there is an elevating level of carbon dioxide in the atmosphere, more amount of carbon dioxide gets dissolved within the water bodies like sea. This further enhances the levels of pH, which leads to coral bleaching and other deleterious things that can hamper biodiversity found in the water ecosystem.

Even on land, the phenomenon of global warming resulting due to an increase in the levels of greenhouse gases leads to change in climate. Due to change in climate, a decline can be witnessed in the diversity of crops, and thus also diminishes productivity, which hampers farmers that depends on productivity as the source of income.

Since the Inbdustrial Revolution, human sources of CO2 emissions have been growing.
Activities such as buring fossil fuels, and deforrestation are the primary cause of the increased CO2 concentrations in the atmosphere.

_____ is the waste that is created in the process of making products.(1 point)
pre-consumer waste
post-consumer waste
e-waste
rucksack

Answers

Answer:

Pre-consumer waste is the waste that is created in the process of making products.

Explanation:

Pre-consumer waste is that waste that is produced in the process of production and processing of products, without these have yet reached final consumers. That is, it is the waste generated as a result of production and not the use of a good.

What would happen if a mutation created a new allele that decreased fitness?

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Fitness describes a reproductive success of an individual. For example, there are green and yellow beetles in a population. If a color affects the reproductive success, for example, green beetles will have more offspring that the brown ones because of their color. So, green beetles have higher fitness. And the beetles with decreased fitness will have less offspring.

So, if a mutation creates a new allele which decreases the fitness, the altered allele will not be inherited in such a ratio as the unaltered allele will.

Describe the relationship between DNA and chromosomes

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When a cell needs to duplicate, DNA strands are tightly coiled into chromosomes (chromosomes are made up of DNA and protein). Genes are certain stretches of DNA that code for a certain protein with a specific bodily function. On a chromosome, the location of the gene is called a locus.
DNA contains all the genetic material that decides a person's traits, such as hair color, eye color, etc. The DNA also passes on traits from the parents to the offspring, which is why children always have common traits with their parents. Genes carry the information needed to pass on these traits.
In summary, DNA, genes, and chromosomes are very similar in their 'composition', since genes are stretches of DNA that codes for certain proteins and chromosomes are made up of coiled DNA. Their functions are the same in the sense that they are all vital in passing on traits from the parent to the child, and therefore in determining the physical traits of the offspring.

Hope this helps! =')

DNA(Deoxyribonucleicacid)...it is the chemical in the cells of an animal or plant that controls what characteristics that plant or animal will have Chromosomes are the part of a cell in living things that decides the sex, character, shape etc...that a person, an animal or a plant will have.. Its my own opinion..

Describe the sequence of oxygen,carbon dioxide and blood flow in your own words

Answers

photosynthesis for co2 and o2. process!!

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