Blood enters on the left side of the heart through the pulmonary veins and enters the left atrium. Then passes to the mitral(bicuspid valve) to enter the left ventricle.
Allele frequencies in a population may change due to four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow. Mutations are the ultimate source of new alleles in a gene pool. Two of the most relevant mechanisms of evolutionary change are: Natural Selection and Genetic Drift.
Answer:
It is usually of uniform thickness. (Ans. E)
Explanation:
In the plant cell wall primary cell wall is existing between the mid lamella and the secondary cell wall. The structure of the primary cell wall is thin, and flexible in nature and they are made up of pectin, hemicellulose, cellulose.
The primary cell wall is the part of the cell wall that has the capability to enlarges the layers by the mechanism known as an acid growth mechanism, with the help of this mechanism plant cells grow via plant cell wall enlargement at a poor pH level.
They are known for many things. They are the coldest climate, they have a very low period of reproduction which also implies that it has low biotic diversity, the organisms are usually simple when it comes to vegetation, the land is influenced by heavy frost when forming, and many many more things.
Answer:
Explanation:
We need to find the energy produced when Sun converts 1.7 kg of mass into energy. Einstein's mass energy relation is given by :
c is speed of light
So, energy produced is 
.
