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Art [367]
3 years ago
6

Nightmares are to ________ as night terrors are to ________. rem sleep; stage 4 sleep narcolepsy; sleep apnea delta waves; alpha

waves stage 4 sleep; stage 1 sleep stage 1 sleep; rem sleep
Biology
1 answer:
erastovalidia [21]3 years ago
4 0
REM- sleep; NREM-sleep
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Complement proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phago
lora16 [44]

Answer:

opsonization.

Explanation:

Opsonization is a term that refers to an immune process where particles such as bacteria are targeted for destruction by an immune cell known as a phagocyte . The process of opsonization is a means of identifying the invading particle to the phagocyte. Without the opsonization process the recognition and destruction of invading agents such as bacteria would be inefficient.

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3 years ago
In which direction does the Sun appear to move across the sky?
11Alexandr11 [23.1K]

Answer:

The answer is B. from east to west

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Please explain the difference between a frameshift mutation and a base substitution mutation.
harina [27]

Answer:

A frameshift changes every codon past it. A base substitution only changes one codon.

Explanation:

DNA is comprised of nucleotides (A, C, T, G) that make up amino acids. Every three bases is called a codon and represents an amino acid.

In a frameshift mutation, a nucleotide is either added or deleted from the sequence. This offsets the entire sequence after it because the reading frame shifts. Here's an example:

ACTGCTATCGTCATC

If another T is added in between the first and second codons, then every codon after will be changed.

ACT>T<GCTATCGTCATC

A substitution mutation is usually less severe, as it only alters one codon in the sequence. These occur when one nucleotide is replaced by another one. Here's an example:

ACTGCTATCGTCATC

Let's say the first G is replaced by a T.

ACT>T<CTATCGTCATC

As you can see, none of the other codons changed.

Typically, a frameshift mutation is considered worse than a substitution mutation.

7 0
3 years ago
Read 2 more answers
Describe natural selection- when does natural selection occur?
sashaice [31]

Answer:

The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.

Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

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3 years ago
In what way is a mushroom similar to a flower?
erik [133]

Answer: Both are always edible.

Explanation:

Mushroom and flowers are use as food and are edible.

Mushroom are succulent and are used as food. They contain low calories, low carbohydrates and are rich in important nutrients like vitamin D, selenium, fibre, potassium,niacin and ribloflavin.

Flowers like marigold, alliums are rich in vitamin C and contain antioxidants that help reduce cholesterol and boost our health.

4 0
3 years ago
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