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dalvyx [7]
3 years ago
9

About how long ago did the first single-celled life form appear on Earth?

Biology
1 answer:
stich3 [128]3 years ago
5 0

Answer:

Around 4.1 billion years ago, the first single celled life form appeared on Earth

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Which of these conclusions is correct about the cities whose temperatures were measured by the students?
Sati [7]

Answer:

If i had more info, id have a better answer. But based of luck and guessing, i am going to go with c) almost 50% of the cities have an average monthly temperature less than or equal to 35 degrees C.

<h2><u>PLEASE MARK BRAINLIEST!</u></h2>

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5 0
3 years ago
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A news report shows a city right after
nydimaria [60]

Answer:

yes

Explanation:

because earthquakes can start fires when gas lines are dislodged due to the earth's shaking.

7 0
2 years ago
Match each leukocyte to its normal percentage in a differential cell count. A. 50-70% B. 20-40% C. 2-8% D. 1-4% E. &lt; 1% basop
Vsevolod [243]

Answers:

A. 50-70% - neutrophils

B. 20-40% - Lymphocytes

C. 2-8% - monocytes

D. 1-4% - eosinophils

E. < 1% -  basophils

Explanation:

The blood differential test is used to estimate the percentage of each class of white blood cell (WBC) present in the blood and to indicate the presence of abnormal or immature cells.

The Test is Performed by taking of blood sample which is smeared onto a glass slide, then it's stained with a unique dye to indicate the class of white blood cells.

The Five class of white blood cells are

Neutrophils

Lymphocytes (B cells and T cells)

Monocytes

Eosinophils

Basophils

The different class of white blood cells are given as a percentage:

Neutrophils: 40% to 60%

Lymphocytes: 20% to 40%

Monocytes: 2% to 8%

Eosinophils: 1% to 4%

Basophils: 0.5% to 1%

Band (young neutrophil): 0% to 3%

7 0
3 years ago
Taking certain drugs during pregnancy is likely to expose unborn children to
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A child would be born with birth defects
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Linnaeus's hierarchical system of classification includes seven levels. What is each of these levels referred to as? A. taxon B.
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The terms order and class both refer to 2 specific levels that are a part of Linnaeus' classification systems.

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