Plasma membrane: a microscopic membrane of lipids and proteins which forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and regulates the passage of molecules in and out of the cytoplasm.
Cytoplasm: the material or protoplasm within a living cell, excluding the nucleus.
Ribosomes: a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins.
DNA: deoxyribonucleic acid, a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
Biotic factors are living things in the ecosystem.
abiotic factors are nonliving things in an ecosystem.
If there is not enough biotic factors in an eco system there will not be enough food such as plants and animals.
And if there is not enough abiotic factors there will be no places for shelter and water.
The ecosystems abiotic and biotic factors make a set carrying capacity for an ecosystem,because if there are not enough biotic factors there would be no food and if there is not enough abiotic factors then there would not be enough shelter or water to live.
hope this helps
<span>In consideration of the following genetic cross: XBXb x XBY Color blindness is a recessive trait (b) and normal vision is dominant (B) and if the parents above had children the possibility of them having a son that is color blind is 9:7 ratio.</span>
A phenotype is a physical characteristic which is visible. Hence when the resulting combinations have two dominant alleles or even one dominant allele, the dominant characteristic is exhibited. The recessive characteristic is exhibited only when both the alleles are recessive.
To find the ratio of phenotypes, we need to place the genotype of the father and mother in a grid form ( attached grid figure)
Here we have two Ff phenotypes which is dominant and two ff phenotypes which is recessive
Hence the ratio is 2:2 or 1:1