X-rays are the radiation that allows us to see through the skin to visualize bones
The answer should be an unconformity
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.
Answer: C) 13.5
Explanation:
Given that the frequency of an allele in a manatee population is 0.15 and said population is at Hard-Weinberg (a well-known equation usually used to calculating processes regarding allele and genotype frequencies), the correct number of 600 individuals that should be homozygous for the allele is <u>13.5 individuals.</u>
ANSWER: Trapped in a ship's ballast or water tank.
REASONING: There are many examples of species being transported in the ballast or water tank of ships. Ships need to be stable so they don't turn over. Stability is provided by weight in the bottom part of the ship called the ballast. This weight often comes from water that is stored in water tanks or the ballast area of the ship. Water is taken in to the ballast at the beginning of its voyage. When it arrives at it's destination, the ballast water is often drained. Anything living in that water will also be drained in to the new location. This is how species like the white perch can be introduced into new areas.
