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tester [92]
3 years ago
15

We hiked to the bottom of the Grand Canyon, while other friends hiked to the top of Mt. Everest. Both of these activities occurr

ed in the _____.
troposphere
mesosphere
stratosphere
thermosphere
Biology
1 answer:
Illusion [34]3 years ago
7 0
Thermosphere i beleive
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In mice, brown eyes (B) are dominant over blue (b). A homozygous brown-eyed male mouse mates with a blue-eyed female and they ha
bazaltina [42]
Parents: Homozygous brown-eyed (M) - B B
                                    blued-eye (F)     -  b b    [since blue (b) is recessive then                                                                                      and brown (B) is dominant then
                                                                           in order for the blue gene to
                                                                           show the you need double                                                                                              recessive or the brown
                                                                           gene absent 

Offspring:
So based on the Punnett cross then you realize that all the possible of spring carry the genotype B b and as such the phenotype brown eyes
                                                                          

8 0
3 years ago
Which of the following characteristics are true for an action potential?
pickupchik [31]

Answer:

I, II, III

Explanation:

A threshold stimulus is a stimulus that is capable to produce a response in excitable tissues such as neurons and muscle fibers. At threshold potential, the outward movement of K+ and inward movement of Na+ become equal to each other. When the potential exceeds the threshold potential, more and more Na+ enter the cell to depolarize it and to allow the opening of Na+ channels. Therefore, to fire an action potential, the threshold must be exceeded.

Conduction of action potential is all or none phenomenon which means that either it occurs or it does not occur. As an impulse is passed by each successive part of an exon, it enters the refractory period during which there is no conduction of nerve impulse. It ensures the one-way conduction of impulse from the cell body to the axon terminal only.

6 0
2 years ago
Which of the following best defines genomics?
podryga [215]
<span>The genome is all the DNA content that is present within a cell of an organism.
So according to above explanation
</span><span>D. The study of the genomes of organisms ,is the correct answer.</span>
4 0
2 years ago
I need help on this-
Sergio [31]

Answer:

Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at the Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place.

Igneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava.

Metamorphic rocks were once igneous or sedimentary rocks, but have been changed (metamorphosed) as a result of intense heat and/or pressure within the Earth's crust. They are crystalline and often have a “squashed” (foliated or banded) texture.

Explanation:

8 0
2 years ago
A segment of DNA is 400 base pairs long and contains 2 restriction sites for the restriction enzyme HindIII. This DNA is cut wit
r-ruslan [8.4K]

Answer:

I would expect to see 3 bands after completing DNA gel electriphoresis and staining the gel.

Explanation:

The restriction enzyme Hind3 has two Recognization sites in the 400 base pair long DNA molecule.

     As a result the restriction enzyme Hind3 with generate 2 cuts in the target 400 base pair long DNA molecule.

     The number of 2 cuts in the target DNA molecule will generate 3 DNA fragments.From this point of view it can be stated that 3 bands will form after completing DNA electrophoresis and staining the gel.

5 0
3 years ago
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