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hodyreva [135]
2 years ago
8

Which metal is not magnetic, it floats, and has a reaction with NaOH?

Biology
1 answer:
Natali5045456 [20]2 years ago
3 0

Answer:

Alkali metals

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Which of the following correctly describes the order of events occurring during a sympathetic nervous system response?
kow [346]

Answer:

Stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; acetylcholine release

Explanation:

8 0
3 years ago
Identify which type of natural selection is described in each case below.
ICE Princess25 [194]

Answer:

Results in the evolution of the species: Directional selection

Results in new species: Disruptive selection

Favors traits at the two extremes: Disruptive selection

No increase in diversity: Directional selection

One extreme trait is favored: Directional selection

Diversity decreases: Stabilizing selection

Diversity increases: Disruptive selection

Explanation:

Directional selection which is also known as positive selection is known to be a mode of natural selection. In this type of selection, an extreme phenotype is favored over other phenotypes. This makes the allele frequency to move in the direction of that phenotype and this takes place over time.

Disruptive selection (known to be diversifying selection) talks about the certain changes in the population genetics whereby extreme values of a particular trait are favored over intermediate values. This results in new species.

While Stabilizing selection is a natural selection whereby there is a stabilization of the population mean on the particular value of a non-extreme trait. Here the diversity is decreases.

3 0
2 years ago
How does matter flow through an ecosystem?
goldenfox [79]

Answer: When one organism eats another, the matter, or carbon, nitrogen, and other essential elements, are transferred from one to the other. These elements move from the producers, to the consumers, and eventually to the decomposers, cycling the matter through the ecosystem.

Explanation:

5 0
3 years ago
In gel electroscopes, the smallest fragments travel?
devlian [24]
The smallest fragments travel the fastest because a smaller molecule has less resistance making it easier to travel through the gel.
4 0
3 years ago
When observing a group of children at a daycare center, Emily made the following observations:
IceJOKER [234]

Answer:

the answer is a

Explanation:

you can read twice. it show the 5 year emily have longer attention. thay why he see 3 year children go around

7 0
2 years ago
Read 2 more answers
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