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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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Natural selection is based on Darwin’s observation that individuals most likely to survive and reproduce are those _____.
mariarad [96]

Answer:

Explanation:

Natural selection is based on Darwin’s observation that individuals most likely to survive and reproduce are those with traits best suited to their current environment.

8 0
3 years ago
How does the force of friction affect the motion of objects?(2 points)
ser-zykov [4K]

Answer:

It causes the object to slow down or stop.

Explanation:

Friction is a unknown force pressing against another force slightly, making the moving object slow down.

Hope I help :)

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2 years ago
Do pollen grains have the same number of chromosomes as a regular plant cell?
finlep [7]

The pollen grain is actually the male gametophyte generation of seed plants. Inside the anther, pollen mother cells divide by meiosis to form pollen grains whose nuclei contain half the number of chromosomes characteristic of the parent plant. 

(hope that helped answer the question)

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3 years ago
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lukranit [14]

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5 0
3 years ago
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What stages of the cell cycle are included in interphase​
Viktor [21]

Answer:

Interphase is composed of G1 phase (cell growth), followed by S phase (DNA synthesis), followed by G2 phase (cell growth). At the end of interphase comes the mitotic phase, which is made up of mitosis and cytokinesis and leads to the formation of two daughter cells.

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