Question

What are the two gases that animals exchange with their surroundings?
A)oxygen and nitrogen
B)nitrogen and helium
C)hydrogen and carbon dioxide
D)carbon dioxide and oxygen

Someone please help!!!

Answer 1

We people take in O2 and exhale CO2 (oxygen and carbon dioxide)

by the way
Luckily plants take in CO2 and make the C into plant material.
Therefore if you want less CO2, grow plants.

Answer 2

But I was talking about animals...

Answer 3

People are animals. We're mammals.

Answer 4

Here are the answers.

1.D
2.B
3.C
4.D
5.A
6.C
7.B
8.D
9.A
10.B
11.D
12.C
13.B
14.C
15.A
16.B
17.A

Your welcome :)

Answer 5

are these right

Answer 6

the practice I have has 19 questions

Answer 7

yeah your right and here is the answer for the other two
18.D
19.D

Answer 8

Im a potatooooooooooooo (i dont belong here XD) IM NOT CHEATING I DONT EVEN HAVE THESE QUESTION SO DONT SAY IM CHEATING bai bai oh and hayyyyyyyyy CottonCandy

Answer 9

Hahahahahaha hey man

Answer 10

It is D i just took the test

Answer 11

1.D
2.B
3.C
4.D
5.A
6.C
7.B
8.D
9.A
10.B
11.D
12.C
13.B
14.C
15.A
16.B
17.A
18. D
19. D

Answer 12

^ 100% correct

Answer 13

Stanley Yelnats Is Right 100%!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 14

Thanks so much stanley!!

Answer 15

i go to connections academy are these correct?

Answer 16

@:)
YOU SAVED ME

Answer 17

Thanks Stan I got it 100% correct