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Klio2033 [76]
4 years ago
15

Why is a stimulus required for a muscle to contract?

Biology
1 answer:
Charra [1.4K]4 years ago
7 0
When an individual muscle fiber receives a threshold stimulus, it contracts as much as possible. ... a threshold stimulus is the minimum amount of energy needed to make a muscle fiber contract.
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If you pull or cut the top off a pineapple and replant it what would happen?
Sophie [7]

Answer:

It will start growing.

Explanation:

If we cut the top off a pineapple and replant it in the soil or a liquid solution so it will start growing because at the top of pineapple fruit, the vegetative parts such as leaves, stem and buds which bear roots are present so if we cut the top of a pineapple and placed it a soil, it will start growing due to the presence of vegetative parts that is required by the plant for their regrowth.

6 0
3 years ago
Why are ecological pyramids shaped as pyramids?
Sonja [21]
Ecological pyramids are drawn where predators are above prey and they show the population number of each organism shown. Therefore, as the pyramid rises, the population number of the organism decreases, ultimately resulting in a roughly pyramidal shape. Since, organisms higher up the food chain tend to be less numerous than those at the preceding trophic levels, the pyramid is often the classic pyramidal shape. The difference in numbers of organisms at different levels can be so great that logarithmic scales have to be used.
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3 years ago
4. What are the four main functions of DNA?
Sphinxa [80]

Answer:

replication, encoding information, mutation and recombination, gene expression

6 0
3 years ago
Analyze the given diagram of the carbon cycle below.
ElenaW [278]

Answer:

F means oxygen from plant goes into the atmosphere.

Explanation:

2. matter is conserved in this process because plants take carbon dioxide from the atmosphere for photosynthesis then produces oxygen into the atmosphere, animals then feed on plants and later the animal's faecal matter is released into the soil and even when animals die, microorganisms in the soil break I down into absorbable form for plants use. which makes matter conserved.

3. mater is in a circular state from atmosphere to plants to animals to soil then absorbed by plants to restart the process again.

8 0
3 years ago
What Are animals that eat dead animals remains
Katarina [22]

Answer:

Scavenger

Explanation:

Scavengers are animals that consume dead organisms that have died from causes other than predation. While scavenging generally refers to carnivores feeding on carrion, it is also a herbivorous feeding behavior. Scavengers play an important role in the ecosystem by consuming dead animal and plant material

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4 years ago
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