Answer:
mercury is one of the inner planets.
Explanation: The inner planets are also called terrestrial planets.
*gases escaped from them during the planets’ formation.
*mercury, Venus, earth and mars are the four inner planets. they are also called terrestrial planets because they have solid and rocky surfaces similar to earth.
* the inner planets are much smaller than the outer planets (Jupiter, Saturn, Uranus and Neptune).
* the inner planets are composed of mainly heavy metals such as iron and nickel, and they do not have moons. during the inner planet’s formation, thick gas atmospheres are blown away .
C. the answer is c. i just took this test on keystone (i think this is keystone question. right?0
#1 B.)1/2.
#2 A.)probable outcome of a cross
The correct answer is B. Disruptive.
I disruptive natural selection the extreme values for a phenotype are favored. This causes a disruption in the middle of the graph for phenotype distribution, as there is a selection against the average phenotype, hence the name.
In this case of worms, the longest and the shortest worms are the most present, therefore we can conclude that the natural selection is disruptive and favors both of the extremes (short and long) of the phenotype.
Answer:
Retinoblastoma is more common in people due to the mutation of RB gene in them.
Explanation:
Retinoblastoma is a disease that affects the eyes of an individual. It is more commonly eye cancer which occurs on the retina of the eye. Retinoblastoma mainly affects younger children.
When the RB gene is mutated or it is deleted already on any one of a homologous chromosomes, then only one hit rather that two which is needed to cause the development of retinoblastoma and hence the probability is of retinoblastoma to occur is higher in the individuals who have already inherited the RB deletion and also have a genetic predisposition for the retinoblastoma.
