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adelina 88 [10]
2 years ago
9

Please Help.........................

Biology
2 answers:
Dmitrij [34]2 years ago
8 0
B. Add the (mass) of protons and neutrons together.
Yanka [14]2 years ago
8 0
Its B i believe because protons and neutrons are found in the nucleus which makes up the mass of an atom
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It's the Menstrual cycle aka period
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3 years ago
Novel combinations of genes can arise from _______.
sertanlavr [38]

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reciprocal exchange of dna

7 0
2 years ago
This DNA molecule is replicating - write a complimentary strand to this template TAC GGG CAG CAT AAA ATC​
Firdavs [7]

Answer: The complimentary strand will read ATG CCC GTC GTA TTT TAG

Explanation:

The complimentary strand to the replicating DNA molecule is known as messenger RNA (mRNA).

The mRNA directs specific bases to pair the existing base on the replicating DNA strand:

- Adenine (A) pairs only with Thymine (T)

- Guanine (G) pairs only with Cytosine (C)

So, to obtain the complimentary strand of TAC GGG CAG CAT AAA ATC​, substitute each letter with its base pair.

Thus, the complimentary strand will read ATG CCC GTC GTA TTT TAG

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2 years ago
Which of the following does not provide evidence for evolution?
Kitty [74]

Answer:

b) natural variation w/in a species

Explanation:

All the answer you put are evidence of evolution also I have done this before.

7 0
1 year ago
Adaptive immunity comprises two branches: humoral immunity and cellular immunity. What are the characteristics of each of the tw
kotegsom [21]

Answer:

Adaptive or acquired immunity is that we acquire throughout our lives through vaccines (active), breast milk (passive) or injection of specific artificial or natural antibodies to a certain pathogen (passive).

The two great arms of this immunity are the humoral and the cellular.

The humoral refers to the cytokines and immunomodulatory molecules that are responsible for transmitting fundamental messages between defense cells in order to coordinate the destruction of the pathogen between them.

Instead, cellular immunity speaks about cell lineage such as b, t, tcd4 lymphocytes, natural killers, plasmacytes, etc.

It can be said that the humoral factor is the one that coordinates the pathways and the relationships between the cells of the acquired immunity, both are important because the two need each other for adaptive immunity to work.

Explanation:

Examples of the humoral factor: pro and anti inflammatory cytokines, interleukins, complement chain, antibodies, TNF alpha, beta, etc.

Examples of cellular factor: plasmacyst, b lymphocyte, t lymphocyte, NT lymphocyte

6 0
2 years ago
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