Answer: Humans can cause damage to the stability of ecosystems by removing the flowering trees and shrubs
Explanation:
we have the same test
In the Northern Hemisphere, winter generally begins on December 21 or 22. This is the winter solstice, the day of the year with the shortest period of daylight. Summer begins on June 20 or 21, the summer solstice, which has the most daylight of any day in the year. Spring and fall, or autumn, begin on equinoxes, days that have equal amounts of daylight and darkness. The vernal, or spring, equinox falls on March 20 or 21, and the autumnal equinox is on September 22 or 23.
Answer:
The options
a. New combinations of genes yielding genotypes of greater fitness
b. Few heterozygotes because of underdominance
c. Frequency-dependent selection, leading to fluctuations in fitness
d. Heterozygotes with greater fitness, owing to overdominance
e. A random assortment of genotypes because of genetic drift
The CORRECT ANSWER IS b.
b. Few heterozygotes because of under dominance
Explanation:
In genetics, underdominance (at times called "negative overdominance") is the opposite of overdominance.
It is the selection against the heterozygote, that leads to disruptive selection and divergent genotypes. It occurs in cases of inferior and reduced fitness (As in our case study, it is the different chromosomal fusions and inversions)
of the heterozygotic genotype to the dominant or recessive homozygotic genotype. It is unstable as it causes fixation of either allele.
Another example is the African butterfly species Pseudacraea eurytus, which makes use of Batesian mimicry to avoid predation. This species carries two alleles that gives a coloration that is alike to a different local butterfly species that is harmful to its predator. The butterflies who are heterozygous for this trait are observed to be intermediate in coloration and thus encounter an higher risk of predation and a decrease in the total fitness.
An animal category is a gathering of creatures that can breed together that can deliver fruitful prosperity.
Ligers, Mules, They aren't species, they are a mix of 2 animal groups subsequently the name is half and half, they can't recreate in light of the fact that, the two distinct species have two unique quantities of chromosomes. Species can duplicate inside of their own species, since every person inside of the species has the same number of chromosomes.
The crossover's can't imitate in light of the fact that sex cells would never be prepared as their chromosomes would not be right. The half breeds would never happen in nature, they were made by man, I don't know how they fulfilled this, yet, at any rate, thats why the mixtures can't replicate.
