Answer:
For question 20. I believe the answer is C. There would be more iguanas with webbed feet.
Explanation:
It states the iguanas have adapted to different habitats on the island. The iguanas that have webbed feet will be better at getting food in water, but slower on land. So if the land starts to disappear and turns into more water, the iguanas with webbed feet will have a higher chance of survival. Meaning the iguanas with out webbed feet will die out as a population.
 
        
             
        
        
        
Answer:
C
Explanation:
This is a monohybrid cross between involving a gene coding for earlobe. The allele for free earlobe (F) is dominant over that of attached earlobe (f).
N.B: let F represent the gene involved.
A genotypic ratio is the ratio derived from the offsprings based on the actual genetic make-up and not based on their phenotypic appearance as in phenotypic ratio.
A homozygous individual is an individual having the same kind of alleles for a gene while a heterozygous individual is one that has two different alleles i.e. combination of the dominant and recessive allele.
The monohybrid cross is between an individual with attached earlobe (ff) i.e. homozygous recessive individual. (Note that, a recessive trait will only be expressed in a homozygous state) and a heterozygous free earlobeb individual (Ff). (See attached picture). Ff × ff
The resulting four offsprings will 
be expected to have only two distinct genotypes i.e heterozygous (Ff) and homozygous recessive (ff) in an equal ratio i.e. 2:2 ~ 1:1
 
        
             
        
        
        
Hi,
Answer: Sharply Angled
<u>My work:</u> Steep slope can have various definitions one of them is sharply Angled ; another would be to soak in. When people refer to “Steep Slope” they refer to a mountain side. Which could both Soak in and can be sharply angled.
I Hope I Helped!
 
        
             
        
        
        
Je dirais que c'est vrai car le gabbro est une roche à grain grossier et il est igné, ce qui signifie qu'il a été formé par le refroidissement et la solidification du magma ou de la lave. Je n'en suis pas tout à fait sûr, mais c'est mon avis, et je m'excuse pour toute erreur de grammaire car le français n'est pas ma langue maternelle.