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viktelen [127]
3 years ago
11

Practice 1: Which of the following are the major structures of the nervous system. Check all that apply.

Biology
2 answers:
pantera1 [17]3 years ago
8 0
Brain
spinal cord
nerves
kow [346]3 years ago
5 0

Answer:

A,E, F

Explanation:

took bio 4 years ago i think these r right!? hopefully!

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The Earth is about _______ years old, and life has existed on Earth for about _______ years.
Naya [18.7K]

Answer:

is about 4.6 billion years old

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We know all that Mitochondria and Chloroplast are both semi autonomous, but in those organelles there is a organelle which being
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It is chloroplast I guess because once i read that mitochondria has not much importance in being an autonomous organelle
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MATCH THE FOLLOWING ITEMS.
nata0808 [166]

Here are the correct sequenced items...

  1. largest class - <u> carbonates </u>
  2. found in caves - <u> sulfides </u>
  3. contain oxygen - <u> oxides </u>
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8 0
3 years ago
Read 2 more answers
Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mat
Marianna [84]

Answer:

C

Explanation:

This is a monohybrid cross between involving a gene coding for earlobe. The allele for free earlobe (F) is dominant over that of attached earlobe (f).

N.B: let F represent the gene involved.

A genotypic ratio is the ratio derived from the offsprings based on the actual genetic make-up and not based on their phenotypic appearance as in phenotypic ratio.

A homozygous individual is an individual having the same kind of alleles for a gene while a heterozygous individual is one that has two different alleles i.e. combination of the dominant and recessive allele.

The monohybrid cross is between an individual with attached earlobe (ff) i.e. homozygous recessive individual. (Note that, a recessive trait will only be expressed in a homozygous state) and a heterozygous free earlobeb individual (Ff). (See attached picture). Ff × ff

The resulting four offsprings will

be expected to have only two distinct genotypes i.e heterozygous (Ff) and homozygous recessive (ff) in an equal ratio i.e. 2:2 ~ 1:1

4 0
2 years ago
Describe what “the cell cycle” is and its role in human cells.
PtichkaEL [24]

Answer:

The cell cycle is the cycle of which the cells grow and split. The cell cycle consists of two main phases, interphase and mitosis. In interphase, the cell grows and duplicates its DNA to prepare for mitosis. In the phase of mitosis, the cell splits its DNA into two nuclei and is split.

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