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kompoz [17]
3 years ago
8

When the only force acting on a falling object is air resistance, the object is said to be in free fall. true or false

Biology
2 answers:
Tasya [4]3 years ago
7 0
The answer to this is true as air resistance has no definate hold over the object
Nataliya [291]3 years ago
7 0

The answer to that question would be true.

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Beer brewers and wine makers use grain or fruit to make alcoholic beverages. The process uses yeast, single-celled fungi that gr
lord [1]

Answer:

The correct answer is - option a.  

Explanation:

The research and the study of used experiments and precise observations to study and improve the taste and quality of the beer and improve the process of wine and beer making.

This research need practical knowledge than the logic and facts that are essential for improving the process of winemaking and beer so it is a practical craft can be learned by the various programs of study and journals.

Thus, the correct answer is - option a.

4 0
3 years ago
Read 2 more answers
When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
baherus [9]

Answer:

At least 17 PCR cycles or 16 PCR cycles

Explanation:

As we know -

In one chain of  heating and cooling  of polymerase chain reaction (PCR), the strands of DNA gets doubled.

The general mathematical representation of this is

{2^n - (2 *  n)}

where "n" is the number of PCR cycles.

It is given that DNA strands  to be produced is 16 times the original quantity of DNA.

So the PCR cycle must be carried out at least 17 times in order to have DNA strand not less  than 16 times the original quantity of DNA

8 0
3 years ago
It is impossible for sperm to be functional (able to fertilize the egg) until after ________. Group of answer choices
lesya692 [45]

Answer:

The answer is "they undergo capacitation"

Explanation:

Sperm migrate through uterine contractions and the energies of its flagella to the uterine tube. In sperm motility, reverse peristalsis is engaged in the uterus and uterine tubes. For a sperm cell to fertilize an egg, it takes approximately 24 hours. The surface of the egg changes as the sperm penetrates the egg, therefore no sperm is allowed within. The kid is fully genetic, including whether it's a boy or a girl at the time of fertilization. Until they are trained it is difficult for sperm to be working.

8 0
3 years ago
A woman who is a carrier of the hemophilia allele and a man that is normal for hemophilia allele have
blondinia [14]

Answer:

they have a 25% chance of having a son with hemophilia and a 25% chance of having a daughter with it.

Explanation:

Hemophilia is an linked gene so when you create a punnet square those are the result you should receive.

7 0
2 years ago
One species called the naked mole-rat, has some unique differences. They have a social structure similar to that of ants and bee
Verizon [17]

Answer:

May be of the environment they live or genetics.

Explanation:

This naked mole rat species evolved back to an ectothermic life style rather than staying endothermic like all other mammals because of the environment they live or change in the genetic makeup. The main reason for this evolution may be the environmental they lives or through the change in genetic makeup of this naked mole rat species so both factors can contribute in the evolution.

8 0
3 years ago
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