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Lerok [7]
3 years ago
7

in an experiment to determine the effect of exercise on pulse rate student checks his pulse rate and after exercising for severa

l minutes the purpose of checking his pulse rate before exercising is that
Biology
1 answer:
Sladkaya [172]3 years ago
3 0
The purpose of this is to indicate the changes or effects in pulse rate bought by exercise.

We can also call this the control set up, it is where all the setting is same except without the variable that is going to be tested. So in this case, that variable is exercise.

So it is supposed that both set up has same settings such as the amount of time measuring the pulse, or the position of arm or neck etc.
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compare the four kinds of tissues connective tissue, epithelial tissue, muscle tissue, and nervous tissue. hi and also if you do
kirza4 [7]
<h3><u>Connective tissue:</u></h3>

It is the layer under the epithelial tissue in the body. It is stronger than epithelial tissue and is found in many organs. It provides protection.

<h3><u>Epithelial tissue:</u></h3>

It covers the outside of the body like a veil. located in the outermost part of the body. Protects the body against microbes and infections.

<h3><u>Muscle tissue:</u></h3>

It is located in the joint areas and forms the support and movement system. It allows us to make bodily movements.

<h3><u>Nervous tissue:</u></h3>

It is the fastest communication tissue. It allows us to feel pain and the sense of touch. It is impossible to repair this tissue after it is damaged. It causes paralysis. It is very important as it plays a role in the activity of neural transmission.

3 0
3 years ago
With increasing age comes a greater chance of a woman having been exposed to damaging environmental agents such as drugs, chemic
allsm [11]
<h2>Down Syndrome</h2>

Explanation:

Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21

  • Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21
  • Down syndrome is usually caused by an error in cell division called nondisjunction which results in an embryo with three copies of chromosome 21 instead of the usual two
  • Prior to or at conception, a pair of 21st chromosomes in either the sperm or the egg fails to separates
  • With development in embryo the extra chromosome is replicated in every cell of the body;this type of Down syndrome which accounts for 95% of cases is called trisomy 21
  • Maternal age is the only factor that has been linked to an increased chance of having a baby with Down syndrome resulting from nondisjunction;here environmental agents such as drugs, chemicals, and radiation act as mutagens which induce mutation in the fetus
5 0
3 years ago
Read 2 more answers
What are some factors that would promote the gtowth of a town into a large city?
Studentka2010 [4]
Some of the factors are:
<span>-Moderate climate. 
-central geography,
-ease of transportation,
 -highways,
-railroads,
-location near a large body of water

</span>Large cities tend to develop far from cities that had either too hot or too cold temperature. It also must be easily accessible by other regions and provide the people with necessary resources that help them sustain their living (such as water, food crops, woods, etc)
6 0
3 years ago
Bacteria perform the following ecological roles. Which role typically does not involve symbiosis?
xz_007 [3.2K]

Answer: Decomposer

Explanation:

Bacteria feed on the dead and decaying organism, in which they feed on them and obtain energy from them.

It is not a mutual relation because the host cell on which they feed is not alive. They eat the organic matter that is present in environment.

The bacteria and fungi clean the environment in this way. The dead plants and animals are decomposed in the environment and the nutrients get back  into the soil.

hence, the correct answer is option B

7 0
3 years ago
The process of forming a zygote, the union of gametes, is called
bezimeni [28]

Answer:

'Gametes are formed through a process of cell division called meiosis. This two-step division process produces four haploid daughter cells. Haploid cells contain only one set of chromosomes. When the haploid male and female gametes unite in a process called fertilization, they form what is called a zygote.'

Explanation:

6 0
3 years ago
Read 2 more answers
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