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Novosadov [1.4K]
3 years ago
14

What provides an explanation for the presence of mitochondria and chloroplasts in present day cells?

Biology
1 answer:
Sav [38]3 years ago
3 0
The general theory is that mitochondria and chloroplasts began initially as separate cells that were "eaten" by larger cells, but not digested and simply passed on due to their advantages.<span />
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Identify the simple organic molecule formed in the leaf and the process that produces it.
Nesterboy [21]
<span>Glucose sugar is the simplest organic molecule formed in the leaves of green plants. Glucose, and other forms of carbohydrates, are formed through the process of photosynthesis, which is the process by which plants use the energy from sunlight to combine carbon dioxide and water. These simple glucose molecules are what the plant feeds on to grow and thrive, although glucose may also be converted to starch for energy storage, or to structural carbohydrates such as cellulose or lignin.</span>
5 0
4 years ago
Population characteristics and issues​
kow [346]

Answer:

Density, dispersion, growth

Explanation

Population refers to the total number of all members of a species occupying a particular area or habitat at a given time. Populations are not static but change in size, structure and organization. Some of the characteristics of population are:

  • Density which refers to the number of members of a species per unit area or volume.
  • Dispersion refers to the spread and distribution of individuals of a species within a habitat.
  • Growth is the rate of increase or decrease in the number of individuals in a population which is balanced by birth rate and death rate.

The issues that affect population include competition, predation, emigration, diseases and parasites.

8 0
4 years ago
Kelly has been singing at a concert for the next three nights. Choose the word or group of words that BEST replaces the underlin
sashaice [31]

the anwser is c she will be singing

7 0
3 years ago
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Imagine that one egg cell unites with one sperm cell at fertilization. Nine months later, twin brothers are born. Select all of
Margarita [4]

There are two types of twins. In one case, fraternal twins. They can be created when two eggs are existent at the same time inside the mother, and both eggs get fertilized. Each of them grows into a separate baby in the end. The babies that grow from each do not have the same DNA because each egg and each sperm started with not the same DNA. They are basically like other siblings, but they were born at the same time. On the other hand, another type of twins are called identical twins. There is just one egg, and it is fertilized by only one sperm. Normally the fertilized egg would divide and grow to form one baby. But, sometimes once the egg gets fertilized and begins to divide, it can come apart. After it comes apart, each half can begin with dividing and begins to grow into a baby. And because the two babies came from one and the same fertilized egg, they have identical DNA. Just always remember that fraternal twins each have their own DNA, whereas identical twins share theirs.

Even if identical twins have precisely the same DNA, they aren't absolutely identical. Which is the reason why mothers can tell their identical twin babies apart. Identical have the same genotype though. They come from the same fertilized egg anyway. Moreover, identical twins aren't entirely identical since DNA is basically like a guide to building something, yet how your body chooses to build is random. This is exactly the reason why identical twins can have distinguishable fingerprints. One more huge factor why identical twins aren't definitely and entirely identical is due to the environment wherein each of them were nurtured in. Thus, basic biology states that identical twins have the same DNA.


3 0
3 years ago
Veins carry blood ________ the heart.
kykrilka [37]

veins carry deoxygenated blood back to the heart.

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3 years ago
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