<h2>
Answer:</h2>
<u>Igneous basalt rock
</u>
<h2>
Explanation:</h2>
The peripheral layer of Earth's lithosphere which is found under the seas and is shaped at spreading focuses on maritime edges, which happen at different plate limit, is called as oceanic crusts.
It is around 6 km (4 miles) thick. It is made out of a few layers, excluding the overlying residue. The highest layer, around 500 meters (1,650 feet) thick, incorporates magmas made of basalt rocks. The oceanic crust is differentiated from the continental crust through certain distinguishing features such as it is more slender, denser, more younger, and of various concoction piece.
Answer:
A) AV node
Explanation:
According to my research on studies conducted by various medical professionals, I can say that based on the information provided within the question the structure being mentioned is the AV node. The atrioventricular node is responsible for connecting the atria and ventricles transferring the depolarization wave from the atria to the ventricles.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
Answer:
They are sections of DNA that produce the proteins that control an organism's characteristics.
Explanation:
- <em><u>Genes are units of heredity found in a certain place on a chromosome and that codes for a certain product.</u></em>
- A trait of an organism is a characteristic that an organism can pass on to its offspring through its genes
.
- Genes are sections of DNA that contains information which controls a trait. Therefore, a trait depends on genes. Therefore; genes are the sections or segments of DNA that code for a specific trait in organisms.
Answer;
-B3
Explanation;
Refrigerants are divided into two groups according to toxicity:
-Class A signifies refrigerants for which toxicity has not been identified at concentrations less than or equal to 400 ppm; and
-Class B signifies refrigerants for which there is evidence of toxicity at concentrations below 400 ppm.
They are also divided into three groups according to flammability:
-Class 1 indicates refrigerants that do not show flame propagation when tested in air at 21°C and 101 kPa;
-Class 2 indicates refrigerants having a lower flammability limit of more than 0.10 kg/m3 at 21°C and 101 kPa and a heat of combustion of less than 19 kJ/kg;
-Class 3 indicates refrigerants that are highly flammable as defined by a lower flammability limit of less than or equal to 0.10 kg/m3 at 21°C and 101 kPa or a heat of combustion greater than or equal to 19 kJ/kg.
-Therefore; the answer for the above question would be Class B and class 3.
Chromatin
is composed of a DNA and a protein. The DNA is a double helix in the cell
nucleus packaged by histones, a special type of protein. Together they form the
chromatin with a basic structural unit called nucleosome. The chromatin's functions are:
a. to
package DNA into smaller volumes to fit in the cell.
b. to
allow mitosis by reinforcing the DNA macromolecule
c. to
prevent damaging of the DNA
<span>d.to
control gene expression and DNA replication</span>
