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pentagon [3]
3 years ago
6

How do skeletal muscles contribute to blood flow?

Biology
2 answers:
Sholpan [36]3 years ago
5 0

Answer:

A. Skeletal muscles force blood in veins to return to the heart

melamori03 [73]3 years ago
3 0
Veins<span> have low </span>blood<span> pressure compared to </span>arteries<span> and need the </span>help<span> of </span>skeletal muscles<span> to bring </span>blood back to the heart<span>. Most </span>veins<span> have one-way valves called venous valves to </span>prevent<span> backflow caused </span>by<span> gravity. They also have a thick collagen outer layer, which helps maintain </span>blood<span> pressure and </span>stop blood<span> pooling. So your answer would most likely be A</span><span />
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A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost al
zysi [14]

Answer:

The correct option is <em>B) Only triazine-resistant weeds survived and reproduced, so each year more pigweed was triazine-resistant.</em>

Explanation:

With time, the pigweed became resistant to triazine. As we know, according to the theory of natural selection only those species are able to survive and reproduce which are better adapted to live in an environment and adapt to the environmental changes. As the triazine- resistant weeds were better adapted survive and reproduce in the area, it began passing its resistant genes to offsprings. As a result, the population of the pigweed increases.

4 0
3 years ago
Is energy required in selectively permeable membranes? ASAP please
torisob [31]

Answer: Yes, energy is required

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8 0
4 years ago
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5 0
3 years ago
Describe the importance of minerals
Mashutka [201]
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6 0
3 years ago
Compare and contrast p-dependent and p-independent termination of transcription in prokaryotes.
iVinArrow [24]
Compare and contrast two mechanisms for transcriptional termination in bacteria.

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(rho)p-independent termination: Uracil-rich sequence causes RNApoly to pause, stabilized by NusA near open complex RNA exit, UA bonds to weak to hold, DNA-RNA hybrid dissociates AKA intrinsic termination

hope this help
4 0
3 years ago
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