Question

Viruses

A. can mutate.
B. can extract energy from their environment.
C. have a cell membrane.
D. can reproduce on their own.
E. are made of cells.

Answer 1

is the answer A

Answer 2

yes viruses mutate (very easily and quickly)

Answer 3

If samples were brought back from a distant planet, what would be the first evidence of life, assuming its evolution followed the same path as Earth's?

A. Presence of nucleic acids
B. Multicellular life forms
C. Oxygen detected
D. Cell membranes
E. Presence of fatty acids
is the answer B?

Answer 4

It would be C since its based on the same path as Earth.

Answer 5

that would make since, but couldn't it also probably be letter a?

Answer 6

It could be all of them, but Earth is unique since it has Oxygen. Which is why humans would not be able to live on any other planets except Earth.

Answer 7

However, the appearance of nucleic acids which are molecule that could reproduce themselves serve as templates for the synthesis of large molecules with complex bit stable shapes could also serve to be the first evidence.

Answer 8

oops! I meant but stable not bit stable, lol

Answer 9

hmm....

Answer 10

but idk maybe its C. b/c as abe le babe said there has to be oxygen before we get formed ( in b. Multicellular life forms) ...

Answer 11

true! Also if you could check my answer to the following question I would really appreciate.

Answer 12

4. organism
A.
must contain more than one cell.
B.
does not contain genetic information.
C.
cannot do biological work.
D.
can be generated from nonliving materials today.
E.
is either a prokaryote or a eukaryote.

Choice A

5.
A cell
A.
always contains a nucleus.
B.
is found only in plants and animals.
C.
is the fundamental unit of life.
D.
is never an entire organism.
E.
is always prokaryotic.

Choice C

6. Oceans were a good environment for early organisms because they
A.
contained ozone.
B.
shielded organisms from visible light.
C.
obviated the need for a cell membrane.
D.
shielded organisms from ultraviolet light.
E.
were rich in oxygen.

Choice D

7. Oxygen gas (O2) in Earth's early atmosphere
A.
allowed the evolution of anoxic metabolism.
B.
depleted ozone in the atmosphere.
C.
increased damage to organisms by allowing more ultraviolet light in.
D.
allowed organisms to move from the sea to land.

E.
was not toxic to most prokaryotes.

Choice C

8. The organisms that produced the oxygen gas in Earth's atmosphere paved the way for the type of metabolism used by larger organisms, called _______ metabolism.
A.
anaerobic
B.
photosynthetic
C.
aerobic
D.
endosymbiotic
E.
heterotrophic

Choice C


9. Relationships between living organisms can best be gleaned by comparing their
A.
fossil records.
B.
genomes.
C.
metabolic processes.
D.
anatomical features.
E.
behavior.

Choice B

10. Genomes are
A.
the shared genetic information among all living cells.
B.
usually made of RNA.
C.
made of proteins.
D.
the sum of genetic information in a cell.
E.
only found in animal and plant cells.

Choice D

11. All cells in a multicellular organism
A.
contain the same genome.
B.
have the same function.
C.
express the same parts of the genome at the same time.
D.
form all the same proteins.
E.
randomly express parts of the genome.

Choice C

Answer 13

in 4. i guess its E. b/c organisms are either unicellular or multicellular

Answer 14

5. is C.

Answer 15

6. is E.

Answer 16

7. is A.

Answer 17

11. is A.

Answer 18

10. is D.

Answer 19

can you explain why the answer is A?

Answer 20

Not sure about 8 or 9. Sorry.

Answer 21

For which one?

Answer 22

for 11

Answer 23

The genome is the entirety of an organism's hereditary information.

Answer 24

can you explain the difference between multicellular and unicellular

Answer 25

wouldn't 5 be C?

Answer 26

5 is not B. It is not only found in plants and animals, but in bacteria and unicellular organisms.

Answer 27

so do you think that number 8 would be letter c and number 9 would be letter B

Answer 28

I am honestly not quite sure and I don't want to give you an incorrect answer!

Answer 29

unicellular has only one cell but multicellular has more than one cell!!

Answer 30

and 5. a cell is the fundamental unit of life.