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Amiraneli [1.4K]
3 years ago
7

Living things must maintain a fairly constant pH balance because the pH level determines

Biology
1 answer:
butalik [34]3 years ago
4 0

Answer:

My guess would be the fourth option

Explanation:

All living thing have chemical reactions within their body, and ph can affect thous reactions.

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Which of the following would be a T-dependent antigen?
anygoal [31]

Answer:

The correct answer is option - protein.

Explanation:

T dependent or the thymus-dependent antigen is the antigen that depends on the T cells with B cell to produce specific antibodies. It is mediated by the MHC II molecules with T cells.

This type of antigen includes polypeptides, erythrocytes, and proteins, and other antigens. These antigens contain epitopes.

Thus, the correct answer is option - proteins

8 0
4 years ago
9. On an ECG reading of one cardiac cycle, the depolarization of the main mass of the ventricles is represented by the _______ w
Tpy6a [65]
I think the answer is p wave on the penn foster test
6 0
3 years ago
Read 2 more answers
What is the sleeping period of a seed known as?
m_a_m_a [10]

Answer:

i think it would be known as a dormant seed.

Explanation:

5 0
3 years ago
An important challenge to traditional (pre-1860) ideas about species was the observation that seemingly dissimilar organisms suc
katen-ka-za [31]

Answer:

Dissimilar organisms might have evolved from a distant, common ancestor.

Explanation:

First of all we should know species. Species is considered as a basic unit of taxonomic classification of an organism.

Initially, the scientists are agreed on this phenomenon that all distinct species are evolved gradually from common ancestor. Today, the species which are different from each other just like hummingbirds, humans and whales are from the same ancestor but with the time passage genetic mutation occurs and at the end dissimilar organisms we can see in our environment/surroundings.

6 0
3 years ago
Using the information from problem 11, scientists do a further test cross using a heterozygote for height and nose morphology. T
mote1985 [20]

Answer:

The recombinant frequency between T and S is  18%;

The correct Sequence of genes is T-A-S

Explanation:

The table below shows the recombinant frequency between heterozygous height and nose morphology:

Tall-uptrend snout                            40%                            Expected

Dwarf-downtrend snout                   42%                            Expected

Dwarf-uptrend snout                         9%                             Recombinant

Tall-uptrend snout                             9%                             Recombinant

Sum Total                                           100%

To calculate the recombinant frequency; we have :

=9+9

=18%

Hence, the recombinant frequency between T and S = 18%

The determinant of the corect sequence of the genes is  T-A-S

4 0
3 years ago
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