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pshichka [43]
4 years ago
12

In which disorder does a person find it difficult to fall asleep or stay asleep for a long time?

Biology
2 answers:
Tcecarenko [31]4 years ago
4 0
Insomnia. My friend has it.
slava [35]4 years ago
3 0
I'm pretty sure the answer is insomnia
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The sun provides light energy to the earth via
Natasha_Volkova [10]
The sun provides light energy to the earth via Solar particles, I think.
6 0
3 years ago
B=black and b=brown. A Bb guinea pig crosses with a Bb guinea pig, and four offspring are produced. All of the offspring are bla
Sladkaya [172]

If two Bb guinea pigs cross, there are four possible outcomes:

  • both pass the B: the son is BB
  • one of the pass the B and the other pass the b: the son is Bb
  • both pass the b: the son is bb

Since B (being black) is dominant, the son will be black in both BB and Bb cases. In order for a son to be brown, he must be a pure bb specimen.

So, if all of the offspring are black, it means that all four guinea pigs are either BB or Bb, which in turn means that at least one of the parents passed the B gene.

8 0
4 years ago
Why are so many starch grains found in the cortex?
rosijanka [135]

There are many grains of starch in the cortex because it represents the reserve food material of plants.

This source of food material is consumed during plant metabolism, as food when plants are under stress, or as an energy source in seed germination and early seedling stages.

The cortex, in plants, is a vascular tissue responsible for the transport of food (processed sap) from the leaves to the rest of the plant .

Starch grains are the most common solid particles that plant cells develop within plastids.

Assimilation starch is a temporary product of photosynthesis and is formed in chloroplasts, while reserve starch is formed in amyloplasts, which are contained in parenchymal cells of the cortex, in vascular tissues of stems and roots, in the pith of stems, in fruits, leaves, fleshy cotyledons and in modified stems, such as tubers and rhizomes.

Starch is the main energy and carbon reserve in plants, supplying the energy and carbon skeletons necessary for the plant's metabolism during periods of darkness, when photosynthesis is inactive.

Therefore, we can conclude that starch grains (ergasstic substances) are found in abundance in the cortex because it represents a reserve of essential molecules for the functioning and maintenance of the cellular structure.

Learn more here: brainly.com/question/18303563

4 0
3 years ago
Is during mitosis when the cell is most vulnerable
Harrizon [31]
I believe it is the red blood or platelets cell since white blood cells are trying to defend themselves
6 0
3 years ago
Environmental factors can influence natural selection because they can increase or decrease
disa [49]
The population of the organism. Either forcing some away or drawing the ones who can adapt in.
7 0
4 years ago
Read 2 more answers
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