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Helen [10]
3 years ago
13

How do scientists know that humans originated in Africa?

Biology
1 answer:
exis [7]3 years ago
4 0
The oldest bones of human decent were found in Africa
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Using this passage, fill in the blank with either G1, G2, or G3. (1) All dogs are mammals. (2) All mammals are things with hair.
AleksandrR [38]

Answer:

Given the values for G1, G2, and G3, the blank spaces are filled below.

Explanation:

Assuming that

G1 = dogs

G2 = mammals

G3 = things with hair

Then

(A) All <u>G1</u> are <u>G2</u>

(B) All <u>G2</u> are <u>G3</u>

(C) Therefore, all <u>G1</u> are <u>G3</u>

8 0
3 years ago
Which of the following is a correct statement about sugar movemetn in phloem?
Simora [160]

Answer:

a. movement can occur both upward and downward in the plant

Explanation:

The phloem loading causes the accumulation of sugars in the sieved elements generating a negative solute potential (quedas), with a drop in water potential (ψw), so water enters the sieved elements increasing the turgor pressure (ψp). With the discharge of phloem in the drain occurs lower concentration of sugars in the screened elements, increases the solute potential, becoming positive, thus the phloem water potential increases and thus the water leaves the conducting vessel. In the specific case of sugar movement in the phloem, it can be stated that this movement can occur both up and down in the plant.

7 0
3 years ago
Urgent please answer
svetlana [45]

Answer:

1) It's called taxonomy

2) There are 7

3) The basic difference between them is Monera are unicellular and prokaryotic cellular structures, whereas Protista are unicellular and eukaryotic cellular structure. Cell organelles are absent in Monera, but Protista is well-defined and has membrane-bound organelles.

4) Reptiles and Fish belong to kingdom Animalia

4 0
3 years ago
Which of the following best describes a crevasse?
belka [17]

the answer is B which is a crack in the topmost section of a glacier. I hope you got this right

4 0
3 years ago
Which is the best example of plant tissue?
Roman55 [17]

Answer:

The first picture is the best example of plant tissue.

Explanation:

Thank u and I hope this helps ;)

7 0
3 years ago
Read 2 more answers
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