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Aneli [31]
3 years ago
11

Most of today’s environmental problems began during which period(s) in human history?

Biology
1 answer:
coldgirl [10]3 years ago
3 0
Industrial revolution...
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In his study of pea plants , Gregor Mendel used which method to produce offspring?
BigorU [14]

Answer:

hope it helped

Explanation:

Gregor Mendel is known for his study on pea plants about the inheritance.

To understand the inheritance, he had experimented with pea plants.

He had performed a cross-pollination production method between two different plants of the pea and prevented self-pollination in it.

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Digiron [165]
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Describe the action mechanism of labile toxin by placing the steps in the correct order.
vaieri [72.5K]
I cannot found the exercise anywhere, so I will just explain how the toxin works.

A toxin is a toxic substance made by a living organism such as a bacterium, a fungus, a plant or an animal.

Labil toxins are toxins which are by easily degraded. among these toxins, there is the toxin of Escherichia coli and the cholera toxin of <span>Vibrio cholerea.
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The intracellular target of cholera toxin is adenylate cyclase, one of the most important eukaryotic cell regulatory systems. This enzyme is involved in the conversion of ATP into a cyclic AMP (cAMP), a crucial intracellular messenger in a wide variety of cellular processes.
Cholera toxin catalyzes the transfer of ADP-ribose from NAD (Nicotinamide Adenine Dinucleotide) to a specific arginine residue of the Gsa protein, resulting in the activation of adenylate cyclase and consequently the increase of the intracellular level cAMP. AMPc activates a cAMP-dependent protein kinase, which leads to phosphorylation of the protein, modification of ion transport and finally diarrhea.
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3 years ago
How do geologists find mineral deposits?
kvv77 [185]

Answer:

To find a mineral deposit, geologists study the geology of a lot of places. They then go to a spot where that type of mineral deposit could be found. They test the properties of the soil and rocks. They look at the chemistry and the physical properties.

Explanation:

8 0
3 years ago
The diagram shows two solutions separated by a membrane. Water molecules can cross the
Tatiana [17]

Answer:

partially permeable

Explanation:

A dilute solution contains a high concentration of water molecules, while a concentrated solution contains a low concentration of water molecules. Partially permeable membranes are also called selectively permeable membranes or semi-permeable membranes. They let some substances pass through them, but not others.

4 0
3 years ago
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