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aksik [14]
3 years ago
9

What is the structure of an atom?

Biology
2 answers:
kogti [31]3 years ago
6 0
The atom number of the<span> protons in </span>an<span> element </span>is<span> constant.

</span>
Ksenya-84 [330]3 years ago
3 0
In the nucleus of an atom (the center part) there are protons and neutrons, and floating around them are electrons. here is a pic. hope it helps you!

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Which of the following changes in aging skin contribute to increased susceptibility to infections? Select all that apply. decrea
Luba_88 [7]

Answer:

The answer is langerhans cells.

Explanation:

The first option is false. Melanocytes are cells that are responsible for the production of melanin throughout the skin of the body which affects the skin color.

The second option is also false. The Sebaceous glands are located at the end of the hairs on the skin and are responsible for producing oil throughout.

The third option is correct because langerhans cells are responsible for producing antigen throughout the skin and they are a part of the skin's immune system.

I hope this answer helps.

6 0
3 years ago
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Which of the following is involved in "double fertilization"?
ale4655 [162]
I belive the answer is all of the above
8 0
3 years ago
Which of the following describes a properly controlled experiment?
netineya [11]

Answer:

Option D, Five radish plants are grown in sunlight, while another five radish plants are kept in the dark.

Explanation:

In a controlled experiment, impact of one independent variable is studied on the dependent variable.  

Here in this study sunlight is the independent variable while the radish plant is dependent variable.  

The researcher wants to study the effect of sunlight on radish plants when they are exposed to it   and compare it to the effect created on radish plants  that are kept in dark.  

Hence option D is correct.

3 0
3 years ago
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If you can help me thank you
Ivan

Answer:

quantitative

Explanation:

because it discuses the number of the petals

4 0
3 years ago
Can someone please check if my answers are right for questions 34 and 35. Thanks!!
antoniya [11.8K]

Answer:

yes the answer are actually very correct

7 0
2 years ago
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