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Tanya [424]
3 years ago
15

I need help doing this

Biology
1 answer:
Levart [38]3 years ago
3 0
As the lines get closer that means that the elevation is getting higher and that is were the mountain or hill starts. 
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Cells without a nucleus are
puteri [66]

Answer: prokaryotic cells

     Explanation:

A prokaryotic cell is a cell without a nucleus.  Since this is a simple definition I cannot explain much further, but an example of a prokaryotic cell is bacteria.

7 0
2 years ago
Bundles of axons in the central nervous system are called
Karolina [17]

Answer: Bundles of axons in the central nervous system are called a "tract"

Explanation:

Axons(nerve fiber) consist of long slender projection of neurons or nerve cells that conduct and transmit impulses away from the neuron or nerve cell body. Axons are surrounded by endoneurium layer which contain protein fluid that surround each axon.

Bundles of axon in the CNS is known as tract. We have ascending tracts and descending tracts. The ascending tracts function are to conduct and carry impulses along the spinal cord to the brain while the descending tracts transmit and carry the impulses from the brain to lower regions (downward) of the body. Tracts are identified by their origin (where the bundle start) and also the end/termination of axon bundle.

The largest tracts are fasciculi gracilis and cuneatus which are known as ascending tracts.

7 0
3 years ago
Which structure has the active sites where the heads of the thick filaments will bind?
Gre4nikov [31]
THE ACTIN has the active site to which the heads of the thick filament will bind.
The muscle is made up of two major protein fibers, which are the actin and the myosin. Muscle contractions occur when myosin and actin slide over each other in a series of repetitive events. The protein actin has a thin structure and is abundant in eukaryotic cells while myosin is a thick filament.
7 0
3 years ago
These are an important source of best short term energy
shtirl [24]

the correct answer is carbohydrates because this fat can produce both short and fast energy.  


8 0
3 years ago
Compare and contrast what happens in mitosis and meiosis and discuss the importance of each process to a living organism.
Semenov [28]

In mitosis, the first stage is prophase. The nucleolus disappears and the two centrosomes begin to form the mitotic spindle. The spindle xtends between two opposite poles f the cell. Next is the metaphase. The centromeres of the chromatid pairs align at the center of the miotic spindle. Then anaphase, the centromeres will split that separates the chromatid pair. They are now called chromosomes. The last phase is the telophase. The chromosomes will then form a thread-like chromatin and for ache envelope, a nucleoli appears. <span>The type of cell division that produces gametes with half the normal chromosome number is the meiosis. Meiosis is the type of cell division used in sexual reproduction. It will occur in the testes and ovaries.</span>

6 0
3 years ago
Read 2 more answers
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