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Burka [1]
3 years ago
9

4. Why is nitrogen fixation so important?

Biology
1 answer:
myrzilka [38]3 years ago
5 0

Answer:

Symbiotic soil microbes convert nitrogen gas to a form that the plants can use (NH4+ or NO3-)

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Muscle tissues are characterized by the presence of elongated cells, often called ____________ , that can contract to create mov
PtichkaEL [24]

Answer:

1. Muscle Fibers

2. Bones

3. Joints

Explanation:

Muscle tissue is made of muscle fibers. The plasma membrane of a muscle fiber is called sarcolemma while its cytoplasm is known as sarcoplasm. Muscle cells are characterized by the presence of specialized endoplasmic reticulum which is called sarcoplasmic reticulum.

Muscle cells exhibit contractility and extensibility. The ability of muscle cells to shorten their length forcibly in response to a stimulus is their contractility. Muscle fibers have the ability to extend and shorten themselves.

Extension and contraction of muscle fibers are responsible for the movement of the human body and its parts.

Muscles are attached to bones via tendons which in turn are the fibrous connective tissues. Muscles are also part of our joints where they assist in the movement by pulling the bones as well as stabilize and strengthen the joints.

7 0
3 years ago
Read 2 more answers
What does it mean that Nikoleta is in the 10th percentile for both length and weight? Is that a desirable statistic if she was i
miv72 [106K]
90% of people weigh more than Nikoleta and 10% weigh less.
4 0
3 years ago
Amino acids are usually taken up into animal cells using a coupled transport system in the plasma membrane. Clearly stated in th
exis [7]

Answer:

It requires energy

Explanation:

In the coupled transport system, coupled carriers couple the inward transport of one solute across the membrane to the outward transport of other solutes across the membrane. The tight bonding that occurs between the transport of two solutes allows these carriers to utilize the energy stored in one solute, usually an ion, to facilitate transport of the other. With this way, the free energy released during the movement of an ion down an electrochemical gradient is utilized as the driving force to transport other solutes inwards, against their electrochemical gradient.

3 0
3 years ago
What’s wrong with the food chain ?
fiasKO [112]

Answer:

nothing is wrong

Explanation:

7 0
3 years ago
Why do you think this pest control technique is not practiced everywhere
Andrej [43]

Answer:

Pesticides can contaminate soil, water, turf, and other vegetation. In addition to killing insects or weeds, pesticides can be toxic to a host of other organisms including birds, fish, beneficial insects, and non-target plants.

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3 years ago
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