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Eduardwww [97]
3 years ago
10

A train travels 50 km/h south for 2 hours. Then the train

Biology
1 answer:
Virty [35]3 years ago
6 0
The train traveled 100km (50x2) down and then 375km (75x5) up. So the train is 275km (375-100) up from where it started. 
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What is wrong with this DNA molecule?
Natali5045456 [20]

Answer: The base pairing in the DNA molecule is incorrect.

This is because adenine (A) always pairs with thymine (T) and guanine (G) always pairs with cytosine (C).

4 0
3 years ago
The sequence of subunits in a protein is most directly dependent on the
kumpel [21]

The sequence of sub units in a protein is most directly dependent on the DNA in the chromosomes in a cell

Answer: Option B

<u>Explanation:</u>

Any life events that takes place in a cell depends upon the central dogma of life that is the DNA getting transcribed into RNA and the RNA getting translated into protein, therefore we can conclude that the sequences of amino acids are based on the sequences of DNA that are present inside the chromosomes that are packed in a nucleus of a  cell.

3 0
3 years ago
Semen creates a(n)__________ environment for sperm to safely travel through both the male and female reproductive tracts.
Assoli18 [71]

Semen creates a(n)<u>alkaline </u>environment for sperm to safely travel through both the male and female reproductive tracts.

In the field of biology, semen can be described as a white, slippery fluid that is released from the male reproductory organ. Semen is also referred to as the seminal fluid.

The semen of males carries the sperm cells which are required for the fertilization of the female egg. The conditions should be favorable for the process of fertilization to occur.

The natural atmosphere of the vagina of a female is acidic in nature. The sperms need a neutral environment for survival. Hence, the semen is produced alkaline in nature to prolong the lifetime of sperm cells. The alkalinity of the semen neutralizes the acidity of the vagina.

To learn more about semen, click here:

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8 0
1 year ago
PLEASE HELP ME ;0;
yuradex [85]

Answer:

Answer is uhhhhhhhhh

Explanation:

A??

The scientist collaborates with others to plan and carry out an experiment and then writes a paper that has a clear conclusion. He submits it to a professional journal for peer review, after which the results are presented publicly.

5 0
3 years ago
Read 2 more answers
Pure-breeding sweet peas with purple flowers and round pollen are crossed with pure-breeding sweet peas with red flowers and lon
Anestetic [448]

Answer:

C. 40

Explanation:

Pure-breeding means that the individuals are homozygous for the genes being analyzed.

From Mendel's Law of Dominance we know that the traits that appear in the F1 are the dominant ones.

I will call:

P_ = purple flowers

pp   = red flowers

L_ = long pollen

ll  = round pollen

Initial cross:

P      Pl/Pl    x    pL/pL

F1              Pl/pL

<u>Test cross</u> (cross with a homozygous recessive individual):

Pl/pL   x  pl/pl

<u>Expected progeny:</u>

Pl/pl = Parental (purple flowers, round pollen)

pL/pl = Parental (red flowers, long pollen)

PL/pl = Recombinant (purple flowers, long pollen)

pl/pl = Recombinant (red flowers, round pollen)

20% of the offspring have purple flowers and long pollen (PL/pl).

Every time crossing over happens in the meiosis of the F1 individual, both a <em>PL</em> gamete and a <em>pl</em> gamete form. That means that 20% of the offspring will also be pl/pl, and the total proportion of the offspring that will be recombinants will be 40%.

A distance of 1 map unit corresponds to a recombinant frequency of 1%.

A recombinant frequency of 40% therefore means that 40 map units separate the glower color and pollen shape genes.

5 0
3 years ago
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