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Radda [10]
3 years ago
11

Help me PLEASE! Choose one answer! First one to answer get Brainliest!

Biology
2 answers:
Anastaziya [24]3 years ago
7 0

Answer:

B

Explanation:

kvv77 [185]3 years ago
6 0

Answer:

The answer would be B.

Explanation:

This is because absolute dating methods determine how much time has passed since rocks formed by measuring the radioactive decay of isotopes or the effects of radiation on the crystal structure of minerals.

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Iron rich deposits that formed about 2 billion years ago have red layers. Layers formed before then were not red. The red layers
Amanda [17]

Answer:

D. The biosphere change the lithosphere

Explanation:

The red formed due to oxygen which is produced by plants in the process of photosynthesis. This oxygen then reacted with iron atom and formed oxidized iron layers of sedimentary rock. So here plants are responsible for the formation of these layers and we considered plants as part of biosphere so we can say that biosphere is responsible for the change of lithosphere.

3 0
3 years ago
Please help i am giving away brainiliest
Vsevolod [243]

Answer:

A

Explanation:

Natural selection occurs when an environment makes organisms with certain traits more likely to survive and reproduce.

Asexual reproduction results in no genetic variation (meaning differences in traits, also called divserity). Genetic variation must be present for certain organisms to be better suited to their environment, because in its absence all organisms share the same traits. This rules out B, C, and D. I hope this helps :)

6 0
3 years ago
The ans consists of how many neurons in a pathway?
sergejj [24]

Answer:

The efferent pathways of the ANS consist of 2 neurons that transmit impulses from the CNS to the effector tissue. The preganglionic neuron originates in the CNS with its cell body in the lateral horn of the gray matter of the spinal cord or in the brainstem.

Explanation:

add me as brain

6 0
3 years ago
Barbara is converting 78°F to degrees Celsius. First, she subtracts 32 from 78. What is the next step?
baherus [9]

Answer:

the next step is to multiply the result by 5/9.

Explanation:

Below, the formula to convert Farenheit degrees to Celcius.

T(°C) = (T(°F) - 32) × 5/9

If barbara already subtracted 32 from 78, now the next step is to multiply the result by 5/9.

T(°C) = (78°F - 32) × 5/9 → T(°C) = (46) × 5/9 = 25.55°C

7 0
3 years ago
Read 2 more answers
What might cause a cold spell in the northern United States?
ehidna [41]
I'm pretty sure it would be D... If that's wrong I'm sorry.
4 0
3 years ago
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