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ch4aika [34]
4 years ago
8

What indicates to a muscle that it should contract

Biology
1 answer:
andrezito [222]4 years ago
8 0
Muscles contract after being activated by motor neurons.
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masha68 [24]
Both A & C are correct

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3 years ago
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If a single mutation turns off the growth of some pairs of legs within an organism, what's most likely affected
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4 years ago
How many nodules are in a bean plant?
Deffense [45]
<span>Bean roots will have no nodules if there are no compatible Rhizobium bacteria in the soil. The nodule is a symbiotic relationship between the plant and the bacteria. Nitrogen fixing root nodules are pinkish in color. Green root nodules indicate actively reproducing bacteria that are not fixing nitrogen. The number of nodules depends on the amount of innoculant (Rhizobium) available in the soil. Look at the photos and make an estimate like x nodules per y linear inches of root. Hope this helps. 

The edible part of the radish root functions as a food storage organ. The string parts of the radish root function as normal roots absorbing water and dissolved nutrients. Bean roots have no modifications for food storage. Radish roots don't have nodules. The radish root is a "tap root". The bean root is a "fiberous root" 

Beans don't grown faster than radishes because of the root nodules. Bean seeds are large. Radish seeds are small. The energy stored in the bean cotyledons helps the seedling get a fast start. The radish gets a slower start from less stored energy.</span>
7 0
3 years ago
How do animal behaviors lead to successful reproduction and growth of their young?
VikaD [51]

Answer: Their actions help the young survive in the wild

Explanation: Examples of behaviors that affect the probability of animal reproduction could include nest building to protect young from cold, herding of animals to protect young from predators, and vocalization of animals and colorful plumage to attract mates for breeding.r

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