Answer:
C
Explanation:
During their development, many organisms look similar, suggesting that very different organisms may have a common ancestor. - Think of the human fetal neural / spine development which mirrors other species.
Answer: A. The hydrogen bonds cause water to resist a change in temperature.
Explanation:
Heat of vaporization is defined as the amount of heat required to convert 1 mole of liquid to gaseous state.
Water has high heat of vaporization due to the presence of strong hydrogen bonds between hydrogen and a electronegative element oxygen. As the water molecules are strongly bonded to each other, large amount of heat is required to raise the temperature of water.
The molecules will not be able to gain enough kinetic energy and thus temperature changes slowly.
Answer:
b. A change occurs in the environment.
d. Poorly adapted individuals have decreased survivorship.
a. Well-adapted individuals leave more offspring than do poorly adapted
c. Genetic frequencies within the population change.
Explanation:
Genetic variation is the variation in DNA sequences between individuals in a population. Looking at the analogy of the question; there is need to first be a change in the environment. This is being followed by decrease in poorly adapted individuals due to the fact that they wont be able to cope with ambient change in the environment. Therefore, as a result only well- adapted individuals would thrive to leave more offsprings than the poor adapted ones.
As such, Genetic frequencies within the population change with time.
Answer:
d. 1/3
Explanation:
Given, M is a dominant allele which is responsible for tailless kittens and m is recessive wild type allele which leads to kittens with tail. M is a lethal allele which means that if it is present in homozygous condition, the kitten will not survive. So the Manx cats should be heterozygous i.e. Mm.
When they mate, Mm X Mm :
M m
M MM Mm
m Mm mm
1/4 kittens will have MM genotype so they will not survive. Out of the remaining kittens, 1/3 will be mm and hence they will have normal tail. Remaining 2/3 will have Mm genotype like their parents and will be born without tail. Hence, there is 1/3 probability that one of the four kittens will have a normal tail.