The answer is D. In a
geological era, when the plants and animals
in the then environment die, they get buried
in sediments. These sediments are covered
by other sediments of another geological
time within which are the remains of dead species
of the then geological era. These sediments from different geological times have different properties hence
form visible strata that can be studied to identify the kind of environment in the then geological time. Their
fossils can also be studied to identify
the kind of species that roamed the earth during the time.
Answer:
D. Genetic recombination would not occur.
Explanation:
If this did not occur, all individuals would be identical to its parent unless a mutation occurred.
Chloroplasts is to conduct photosynthesis mitochondria is mostly the energy
Answer: The correct answer would be YYRr and Y_Rr
Explanation:
Let us denote Y and y be the alleles of the gene responsible for seed color and R and r be the alleles of the gene responsible for seed shape. Capital letter is for dominant allele and small letter is for recessive allele.
Being dominant traits, both the parents should have at least one dominant allele of both the genes. It is because the phenotype of both parents is yellow and round seeds.
In addition, F1 shows single phenotype for seed color but both phenotype for seed shape. The presence of recessive phenotype in F1 indicates that both the parents must be heterozygous for seed shape, that is, Rr.
However, for seed color, it is possible that either one or both were homozygous, that is, either both YY or one parent is YY and another parent is Yy.
Answer:
The relationship between CFCs and ozone layer is that the release of CFCs in the atmosphere harms or depletes the ozone layer
Explanation:
CFCs or chlorofluorocarbons are made up of chemical compounds like carbon,fluorine and chlorine. They are used as important refrigerants and solvents in the manufacturing of refrigerators, ACs, coolers and aerosols sprays. When it is released in the environment due to improper appliance disposal or leakages it goes high up in the atmosphere where it is broken down by the UV rays and then the chlorine atoms released after this process attack the ozone molecules and destroy them. Therefore, depleting the ozone layer.
