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cestrela7 [59]
2 years ago
7

Describe the action of the muscles when the lower arm moves downward.

Biology
1 answer:
Luda [366]2 years ago
7 0

Answer: your muscles retract

Explanation: please mark me as brainlest

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What must a single-celled organism do before it can reproduce​
soldier1979 [14.2K]

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In order to reproduce, an organism must make a copy of this material, which is passed on to its offspring. Some single-celled organisms reproduce by a process called In binary fission, material from one cell separates into two cells.

Explanation:

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The cell carries out normal functions during
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A cell carries out it's normal functions during mitosis

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in its second messenger role, cAMP activates enzymes called ____________, whose jobs is to regulate other enzymes by adding phos
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In its second messenger role, cAMP activates enzymes called kinases, whose job is to regulate other enzymes by adding phosphate groups to them.

<h3>What is a kinase?</h3>

A kinase is an enzyme that catalyzes the addition of phosphate group and thus regulates cell signaling.

Moreover, phosphatases are enzyme that catalyze the removal of a phosphate group in a protein.

In conclusion, in its second messenger role, cAMP activates enzymes called kinases, whose job is to regulate other enzymes by adding phosphate groups to them.

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2 years ago
Different microbes grow in a wide variety of environmental conditions; however, most have preferences for certain temperatures,
lesya692 [45]

Answer:

this is a TRUE statement.

Explanation:

Different microbes grow in a wide variety of environmental conditions; however, most have preferences for certain temperatures, pH, and atmospheric gases because although microbes are widespread in their occurrence,they are found almost everywhere,in the air,water,soil,food,decaying matter,oil deposits,in plants etc.

but their number and their types vary according to the locality and environmental conditions.

Although, some microbes are always present and contribute towards natural flora BUT besides this others are present in specific environments such as some in hot springs bearing very HIGH TEMPERATURE RANGES for example: <em>Thermus aquaticus.</em>

some of them inhabit the acidic or alkaline soil feeding on HUMUS.

Most of the microbes prefer ATMOSPHERIC GASES i.e some require oxygen for their survival .For example: <em>Pseudomonas.</em>

some don't require O2 for survival i.e <em>Spirochete.</em>

IN SHORT, most of the microbes have preferences for various environmental conditions.

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Contrast apoptosis and cancer.
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Apoptosis is a multi-step, multi-pathway cell-death programme that is inherent in every cell of the body. In cancer, the apoptosis cell-division ratio is altered. Cancer treatment by chemotherapy and irradiation kills target cells primarily by inducing apoptosis.

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