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Effectus [21]
3 years ago
7

1. Which of the following solid substances could be classified as the most dense?

Biology
1 answer:
iragen [17]3 years ago
5 0
D I believe it work hope this work
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Mammals are the only animals that have hair. Would you consider the presence of hair in mammals to be an ancestral or derived tr
Fantom [35]

Answer:

derived trait

Explanation:

An ancestral (or primitive) trait/character is a feature inherited from the common ancestor of the species/group of interest, while derived traits are those that were absent in the last common ancestor of the group of interest. For example, considering mammals as the target group, the presence of hair is a shared derived trait relative to other vertebrates, i.e., amphibians, reptiles and birds. However, this trait (hair) is ancestral for humans since the genetically closest species to humans (e.g., chimpanzees), also have hair, and they have inherited this trait from a common ancestor.

8 0
2 years ago
4main elements cells are made of
ludmilkaskok [199]

Answer: there made up of carbon, oxygen, hydrogen, and nitrogen

Explanation: I learNed it in science class

4 0
3 years ago
In three to five sentences, explain the advantage of keeping some DNA needed by mitochondria in the cell’s nucleus and some in t
PolarNik [594]

Answer: Keeping those genes locally in the mitochondria gives the cell a way to individually control mitochondria,” Johnston says, because pivotal proteins are created in the mitochondria themselves. ... Other structures in our cells could also benefit from this type of local control.

6 0
3 years ago
Why does photosynthesis require water? a. because water provides oxygen atoms. b. because water provides electrons . c. because
katovenus [111]

Answer:

The correct answer would be b. because water provides electrons.

During the light reaction of the photosynthesis, the water is photolysed into high energy electrons, hydrogen ions, and oxygen.

The overall reaction can be written as:

2 H₂O + sunlight → 4 H⁺ + 4 e⁻ + O₂

It takes in water-splitting complex associated with photo-system II rooted in the thylakoid membrane of chloroplast.

The oxygen is released as the byproduct of photosynthesis.

The hydrogen ions help in the formation chemiosmotic potential across the thyllakoid membrane which help in the formation of ATP (adenosine triphosphate).

The electrons are used to replace the electrons lost from chlorophyll a of reaction centre associated with photo-system II. The electrons are lost due to the photo-excitation of chlorophyll a.

The electrons lost from chlorophyll a help in the production of ATP and are used to reduce NADP⁺ into NADPH.

The ATP and NADPH are used in light-independent reaction of the photosynthesis to produce glucose or food.

4 0
3 years ago
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DNA is unwound and transcribed through the action of
MariettaO [177]
D- Enzyme unwinds DNA
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