The answer is C
Because the sun Shines only on the equator which is the law of conversion of energy
Answer:
Artificial selection is non-random whereas natural selection, and sexual selection are random selection.
Explanation:
Artificial selection is considered non-random whereas natural selection, and sexual selection are considered as random selection because in Artificial selection, humans select the mating animals in order to acquire the desired characteristics and features in the offspring while on the other hand, natural selection, and sexual selection are happen randomly without the intervention of humans, it occurs naturally so we can conclude that artificial selection is non-random whereas natural selection, and sexual selection are random selection.
Well theory isnt proven. It means you have a strong idea about the subject your talking about. So if a scientist finds evidence that suggests something against the theory then it can be changed.
You are an aspiring botanist and decide to study some orchid genetics. Knowing that the pink color phenotype is an incompletely dominant phenotype, you decide to study it further. You discover that when you cross two pink orchids, you only ever obtain a phenotypic ratio of 1/3 white orchids to 2/3 pink orchids. How might you explain this phenomenon
A)The dominant color allele produces a lethal phenotype when one copy is present. B)The recessive color allele produces a lethal phenotype when two copies are present. C)The dominant color allele produces a lethal phenotype when two copies are present. D)The recessive color allele produces a lethal phenotype when one copy is present
Answer:
C)The dominant color allele produces a lethal phenotype when two copies are present.
Explanation:
Let's suppose that allele R gives a pink phenotype in the heterozygous condition while the allele r gives white phenotype in the homozygous genotypes. So, the genotype of the pink orchids would be Rr. A cross between two Rr plants obtain progeny in following genotype ratio:
1/4 RR: 1/2 Rr: 1/4 rr
Here, the R allele is lethal in homozygous genotypes and the progeny ratio become=
1/3 white: 2/3 pink