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Lady_Fox [76]
3 years ago
11

Which of these BEST describes our current understanding about how species evolve over time?

Biology
1 answer:
storchak [24]3 years ago
4 0

Answer:

Populations evolve as natural selection results in a change in the frequency of alleles within the population over time.

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Eric follows a vegetarian eating pattern, and he wants to know whether he needs to take any vitamin and mineral supplements. wha
Reil [10]

It would be most important for Eric to find out his <em>zinc, iron and vitamin B12 (or  riboflavin) levels, and ensure that he is obtaining adequate amounts of these vitamins and minerals through vegetarian sources </em>.

A vegetarian diet is typically low in zinc rich foods, since meat, shell fish and eggs are the most abundant sources of zinc. In order to ensure that he obtains sufficient zinc, Eric should make sure he consumes vegetarian zinc sources such as legumes, lentils, dairy, nuts and seeds on a daily basis.

Since iron and vitamin B12 are also difficult to obtain from vegetarian sources, Eric should consume iron rich foods such as spinach, kale, whole grains, broccoli, legumes,etc., on a daily basis. As for vitamin B12, daily supplementation of 2.4 μg is recommended for vegetarians. Alternatively, riboflavin fortified cereals and grains are also recommended to meet daily riboflavin requirements.

5 0
3 years ago
The nuclear basket protein complex is a component of the
valina [46]

Answer:

Inside the nucleus.

Explanation:

Nuclear pores are the communication gate between the nucleoplasm and the cytoplasm, and all transport between the two compartments occurs through them. Therefore, they are a key element in function, in the response to external signals and in the differentiation of cells. And this is because they condition, for example, the exit of messenger RNA to the cytoplasm, or the entry into the nucleus of transcription factors that determine gene expression.

The proteins that are part of the pore complex are called nucleoporins. In yeasts there are about 30 different nucleoporins in each nuclear pore, while in metazoans they can be 40 or more. But in the same pore there may be repeated proteins and this causes a pore of a mammalian cell to be formed by about 500 to 1000 total nucleoporins. The pore complex measures about 100 to 150 nm in diameter, with about 40 nm of useful internal diameter, and 50-70 nm in height. It is one of the largest protein complexes in the cell, with about 125,000 kDa molecular weight.

7 0
3 years ago
Explain how gas exchange takes place in the alveoli of the lungs?​
goldenfox [79]

Answer:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Explanation:

4 0
3 years ago
Name 3 types of fossils and describe how they form
stiv31 [10]
1. True form fossil
2. Trace fossil
3. Mold fossil

Fossils are formed in different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt.
5 0
3 years ago
Read 2 more answers
Which statement best explains why meiosis produces haploid cells rather than diploid cells?
Montano1993 [528]

Answer: Haploid cells join to form an organism that has half the number of chromosomes as the parent. Haploid cells join to form an organism that has a complete set of chromosomes.

Explanation:

8 0
3 years ago
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