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Tom [10]
3 years ago
15

What do scientists use to divide the geologic time scale? Major divisions in the fossil records Major divisions in the sedimenta

ry rock layers Evidence for catastrophic events in Earth's history Major changes in mineral deposits in the rock layers
Biology
1 answer:
IgorC [24]3 years ago
3 0
The correct option is B: MAJOR DIVISIONS IN THE SEDIMENTARY ROCK LAYERS.
Geologic time scale refers to a system of chronological dating which relates geological strata to time. Geologic time scale is used by scientists to describe the timing of the events that had occurred in the past, thus the scale divides the earth history into units of varying magnitude. There are four basic block of time, these are eons, eras, periods and epochs.
In determine geological time, rock records provide evidence of past geological events and life forms.
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Proto‑oncogenes are genes that have the potential to become oncogenes through either mutation or an increase in expression. Clas
algol [13]

Answer:

<u>Proto-oncogenes</u>

  • These genes code for protein that normally promote cell division
  • Mutations that increase activity of these genes may lead to cancer

<u>Tumor suppressor genes</u>

  • These genes code for protein that normally prevent uncontrolled cell division
  • Some products of these genes normally function in repairing damaged DNA
  • Mutation that decrease activity of these genes may lead to cancer.

Explanation:

<em>Proto-oncogenes</em> are group of genes that ordinarily help cells develop. At the point when a proto-oncogene mutates or there are such a large number of duplicates of it, it turns into a "terrible" quality that can turn out to be forever turned on or activated when it shouldn't be. At the point when this occurs, the cell becomes wild, which can prompt malignant growth. This terrible quality is called an oncogene.

Tumor suppressor genes are normal gene that hinder cell division, fix DNA missteps, or tell cell when to undergo apoptosis (die). At the point when tumor suppressor gene don't work appropriately or inactivated, cells can develop uncontrollable growth, that ultimately lead to cancer.

7 0
3 years ago
Large numbers of ribosomes are present in cells that specialize in producing ___________molecules
babunello [35]

Answer:

Proteins.

Explanation:

Ribosomes are complex molecules present in all living cells, they are also called organelles. It serves as the site for protein synthesis. They can be gound freely in the cytoplasm or bound to certain organelles like the endoplasmic reticulum. They consist of two major structural components: the small ribosomal subunits, which read the mRNA, and the large subunits, which join amino acids to form a polypeptide chain.

There are 3 types of Ribosomes which are:

• Ribosomes link amino acids together in the order specified by messenger RNA (mRNA).

• Each unit also consist of ribosomal RNA (rRNA) molecules and a variety of ribosomal proteins.

• Transfer ribosomes (tRNA)

7 0
3 years ago
The arteries that branch from the aorta and provide blood to the heart muscle itself are _______________ arteries. a. pulmonary
pickupchik [31]
C. its the Coronary Arteries
6 0
3 years ago
The spinal cord is part of which nervous system? Question 3 options: 1) sympathetic 2) autonomic 3) parasympathetic 4) central 5
igomit [66]

Answer;

-Central nervous system

Explanation;

-The nervous system consists of two main parts: the central nervous system and the peripheral nervous system: The central nervous system is made up of the brain and spinal cord.

-The central nervous system controls most functions of the body and mind.It controls all parts of the body. It receives and interprets messages from all parts of the body and sends out instructions. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.

-The spinal cord serves as a conduit for signals between the brain and the rest of the body and also controls simple musculoskeletal reflexes without input from the brain.

3 0
3 years ago
What formula is 6H20+ 6CO2
Svetradugi [14.3K]

I think that the correct answer is reactants of photosynthesis.

4 0
3 years ago
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