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Len [333]
3 years ago
7

Qué es un cromosoma?

Biology
1 answer:
siniylev [52]3 years ago
7 0

Answer:

I do not speak spanish.

Explanation:

I do. not understand

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In which of the following situations is evolution by natural selection most likely to occur?
Varvara68 [4.7K]

Answer:

b.

Explanation:

Natural Selection refers to the survivability of organisms based on different traits or genes that they have which then get passed on to their offspring. Based on this information we can say that a population of mountain gorillas in which individuals with genes for long hair survive the cold better is the situation in which natural selection is most likely to occur. This is because longer hair in this scenario is a gene that drastically affects the chance of survival for the gorillas and will most likely be passed on to their offspring.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

3 0
3 years ago
In flowering plants, plasmodesmata are narrow channels through cell walls that connect the cytoplasms of adjacent cells. An expl
Naddika [18.5K]

Answer:

Option-D

Explanation:

Plasmodesmata are the plasma membrane lined pores present in the cells of the plants. Inside these pores runs a closed tubelike structure which is an extension of the endoplasmic reticulum.

The plasmodesmata allows cell to cell communication which involves symplast mode of transport that is through its cytoplasm.

The small water soluble molecules like amino acid and sugars can easily pass through these plasmodesmata via diffusion. The large molecules can be transported through these plamodesmata through selective diffusion.

Thus, Option-D is the correct answer.

7 0
3 years ago
A 400 kg box and a 200 kg are to pushed across a horizontal table, the exact same distance with the exact same force. Which box
marysya [2.9K]

Answer:

The 200kg

Explanation:

Because 400kg is more weight and the 200kg would be much easier to push

5 0
2 years ago
What is the main function of veins in a leaf?
sdas [7]

Answer;

Transport of substances


Explanation;

-Veins have vascular tissues, that is the xylem and the phloem. Xylem tissue transports water and mineral salts to the leaf, while phloem transports manufactured food from the leaf to other parts of the plant.

-Leaves need water for photosynthesis and the water is transported from roots to leaves through xylem.

-Veins are spread all over the leaves ,so they can easily transport water to all the cells of leaves.

-After the completion of photosynthesis in a chloroplasts, glucose is formed which may be used for cellular respiration or stored in form of starch. Phloem transports the glucose to other parts of the plant for cellular respiration;

4 0
3 years ago
Read 2 more answers
If no other changes occurred, how would emigration affect the population density of a group of organisms?​
valentinak56 [21]

<u>Answer:</u>

<em>If no other changes occurred emigration would have a negative impact on the population density of a group of organisms. </em>

<u>Explanation:</u>

<em>Emigration is the movement of a part of population out of an area into a new area. </em>It has a negative impact on the population of the old area and positive impact on the population of the new area.

Population density is the population per unit area that is population per square kilometer.

Thus population density will also be negatively affected by emigration. <em>Hence an area that previously was densely populated might become a sparsely populated area due to emigration.  </em>

8 0
3 years ago
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