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3 years ago

Which is the first step that geologists must do to compare rock layers at distant locations?

Biology

1 answer:

Vinvika [58]3 years ago

5 0

Answer:Ordering of Rock Layers

Scientists read the rock layers knowing that each layer is deposited on top of other layers.

The law of superposition states that each rock layer is older than the one above it. So, the relative age of the rock or fossil in the rock or fossil in the rock is older if it is farther down in the rock layers.

Relative dating can be used only when the rock layers have been preserved in their original sequence.

Index Fossils

Certain fossils, called index fossils, can be used to help find the relative age of rock layers. To be an index fossil -

an organism must have lived only during a short part of Earth's history;

many fossils of the organisms must be found in rock layers;

the fossil must be found over a wide area of Earth;

the organism must be unique.

The shorter time period a species lived, the better an index it is.

Fossils that are found in many rock layers, therefore living long periods of time, do not qualify as independent

Explanation: :) ;)

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Lapatulllka [165]

Answer:

E. All of the above

Explanation:

The cell cycle refers to the orderly series of events that make new daughter cells by dividing the existing cells. The cell cycle is required to produce new cells during growth and development, to replace the old and damaged cells, and to repair the tissue by adding the new cells. If the existing cells do not enter the cell cycle, new cells would not be formed to be added to the tissues of the organisms.

However, the cell cycle is regulated at several checkpoints to ensure that a cell enters the process only when the new cells are required by the body and the process is stopped once the required number of new cells are formed. Any deviation from the regulation of the cell cycle may make the cells to enter the uncontrolled cell division. It may even lead to cancer where the cells divide without any control and produce malignant tumors.

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4 years ago

Use the table below to answer the following question.

wariber [46]

What u think it is? what answer?

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4 years ago

After a major environmental change, what happens to species that do not adapt or move?

SSSSS [86.1K]

They will most likely die. Due to the unfamiliarity of the environment and not being able to adapt.

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4 years ago

Help it’s science if u don’t mind! Thx!

raketka [301]

Bottom-producers (plants) 1000
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3 years ago

In exercising muscle, glycogen degradation supplies the muscle with glucose‑6‑phosphate. In order to stimulate muscle glycogen d

nexus9112 [7]

Answer:

The correct answer is d Insulin initiates a protein kinase cascade that utilizes glycogen synthase kinase.

Explanation:

During muscle contraction glycogen degradation occur which result in the formation of glucose-6-phosphate that is supplied to the muscle.This total phenomenon is signaled by steroid hormone epinephrine that deals with the breakdown of glycogen.

But the peptide hormone insulin exhibit the opposite effect that to stimulate glycogen synthesis by activating the catalytic activity of glycogen synthase through the help of phosphorylation by glycogen synthase kinase.

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4 years ago