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harkovskaia [24]
2 years ago
11

Why are autotrophs considered the basis of the food chain?

Biology
1 answer:
jolli1 [7]2 years ago
6 0
They are among the only types of organisms that get their energy from a non-living thing, and they give energy to Primary consumers, which give energy to secondary consumers, which give energy to tertiary consumers, which can give energy to decomposers, etc.
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Upon examining samples of water and mud from a nearby river, you come across an unidentified organism. The organism is unicellul
Tasya [4]

Answer:

A protist

Explanation:

In the given question, the characteristic of an unidentified organism are given which are:

1. The organism is unicellular and autotrophic which means that it is a producer and belongs to a plant like organism.

2. The membrane bound nucleus means that the organism is an eukaryote.

The organism is thus an unicellular, autotrophic and an eukaryote could be a species of algae which is considered a protist. The protists are the organisms which shows characteristic of the ukaryotes but are not considered true plants and animals.

Thus, a protist is correct answer.

3 0
2 years ago
Rb is an important protein for controlling cell proliferation by blocking entry into S phase. How does it exert its effect?
amid [387]

Answer:

The main function of the RB protein is to inhibit the transition from the G1 to S phase. Its activity depends on its phosphorylation state: if RB is not phosphorylated (active state), it is bound to the transcription factor E2F, preventing its translocation to the nucleus and the activation of genes necessary for DNA synthesis; and if it is phosphorylated, by cyclin-CDK complexes, E2F is released and cell proliferation occurs.

Explanation:

Retinoblastoma (Rb) was the first tumor suppressor described and, as we know today, mutations in its structure determine a large number of cancers. Structurally, we speak of a large and multifunctional protein; which is organized in different domains. The activity of this protein is regulated, mainly, by phosphorylation at multiple sites described over the years and is involved in control mechanisms of the cell cycle, apoptosis and senescence.

5 0
3 years ago
The synthesis of ATP from ADP and Pi is an _______ reaction. In mitochondria, ATP synthesis is driven by the flow of _______ dow
Hunter-Best [27]

Answer:

A) exergonic; protons; glycolysis

Explanation:

The synthesis of ATP from ADP and Pi is an exergonic reaction. In mitochondria, ATP synthesis is driven by the flow of proton down a concentration gradient established by glycolysis.

5 0
3 years ago
Read 2 more answers
In single celled organisms, materials are stored primarly in
Alex_Xolod [135]

Answer:

A unicellular organism is formed by a single cell. ... The circulation in unicellular organisms is carried out by the movement of the cytoplasm of the cell called cyclosis.

7 0
3 years ago
Is Crohn's disease dominant or recessive?
Degger [83]
I'm pretty sure it's recessive?
3 0
3 years ago
Read 2 more answers
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