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Goshia [24]
3 years ago
13

At sea level, the atmospheric pressure is ______ pounds per square inch.

Biology
2 answers:
AlexFokin [52]3 years ago
4 0
The answer is c.....
VLD [36.1K]3 years ago
4 0
I believe it is c because if u ask what is sea level
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Explain why the greenhouse effect is necessary but how an enhanced greenhouse effect can harm the planet.
madam [21]
Necessary because it keeps heat in and keeps the planet at the right temperature for life.
It can harm the planet if more pollution occurs and the greenhouse gas effect traps too much heat and causes global warming
7 0
3 years ago
Molluscs with a ventrally flattened foot that move via muscle contractions along this structure are called
pishuonlain [190]

Gastropods are centrally flattened molluscs that move via muscle contractions.

<h3>What are gastropods?</h3>

Gastropods are invertebrates animal that belong to the phylum molluscs. Examples of gastropods are snails and slugs. The lol be in either salt water or freshwater or land. Their body parts include head,mantle, body mass and shell. They have muscular foot which help in movement through muscular contractions.

Therefore, Gastropods are centrally flattened molluscs that move via muscle contractions.

Learn more about gastropods here.

brainly.com/question/18943590

6 0
2 years ago
Which one 1,2,3,4…………………
Vikki [24]

Answer:

3

Explanation:

brain

hope this helps!!!

4 0
3 years ago
Read 2 more answers
Hair Coloring Experiment
leva [86]

The independent variable (hair<em> colorin</em>) causes a <u>response</u> in the dependent one (colorin <em>effectiveness)</em>. The constant variable <u>can not change</u> (<em>curly or straight</em>), the control variable is <u>kept constant</u> (<em>time and environmental conditions</em>). The experimental group receives the <u>treatment</u> (<em>40 students</em>).

------------------------------------------------

INDEPENDENT VARIABLE

Refers to all the variables in an experiment that provoke a response in another variable. The independent variable is modified to analyze its effects on another variable. The researcher changes on purpose the independent variable to observe the response of the dependent variable.

<em>In the exposed example, the independent variable is the red hair coloring </em>

<em>- Red Hair Paint</em>

<em>- L’Oreal</em>

DEPENDENT VARIABLE

Refers to the variable, which response depends on any change in the independent variable. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable.

<em>In the exposed example, the dependent variable is the coloring effectiveness, seen through how well the coloring takes and lasts. </em>

CONSTANTS

This variable does not change during the whole experiment and under any circumstance. It <u>can not change</u>.

<em>In the exposed example, the constant variable is the type of hair, curly or straight. </em>

CONTROL

Controlled variables are kept constant in the control groups and the experimental groups. Unlike the independent variable, the controlled variables do not influence the results. These variables do not affect the response of the dependent variable.

<em>In the exposed example, the controlled variables are the exposure time to the colorings and environmental conditions, such as temperature, humidity, etc.</em>

EXPERIMENTAL GROUP

The experimental group receives the treatment. The researcher apply different treatments to the experimental groups to observe how they affect the dependent variable. There can be several experimental groups.

<em>In the exposed example, the general experimental group is the 40 students' hairs. Because coloring does not have the same effect on different hair colors, the experimental group includes,</em>

<em>- 10 blonds, </em>

<em>- 10 brunettes, </em>

<em>- 10 with black hair</em>

<em>- 10 with red hair</em>

<em>-------------------------------------------</em>

<em>Related link: brainly.com/question/24653783</em>

5 0
2 years ago
Help pls is urgent !!!
ale4655 [162]
I think the answer is C
3 0
3 years ago
Read 2 more answers
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