21) Which example represents a DISADVANTAGE of asexual reproduction?
A)Genetic variety slowly causes hundreds of species of beetles to form from a single species.***
B)A single antibiotic is able to quickly and easily kill millions of genetically identical bacteria.
C)Millions of bacteria are quickly produced by cell division, in one afternoon in a jug of milk that has been left on the counter.
D)Male anglerfish must live on larger females as parasitic mates, since they encounter other anglerfish so infrequently in the deep ocean.
22) What did Charles Darwin mean when he stated that some organisms were 'more fit' than other organisms?
A)some organisms were heavier and stronger
B)some organisms were more likely to reproduce
C)not all organisms had the same natural life span***
D)not all organisms were equally suited to gathering food
I am not sure on question 22, and for 21, I was thought that asexual reproduction leads to less genetic variation.
it c
For question 21, you are correct that asexual reproduction leads to less genetic variation. Asexual reproduction involves only one parent, and the offspring are genetically identical or almost identical to the parent. This lack of genetic diversity can be a disadvantage because it limits the ability of a population to adapt to changing environments or to fight off diseases. In the example given, genetic variety slowly causing hundreds of species of beetles to form from a single species represents a disadvantage of asexual reproduction because it implies that the lack of genetic diversity in asexual reproduction might hinder the evolution and adaptation of a species.
As for question 22, Charles Darwin meant that some organisms were "more fit" than others in the sense that they were more likely to reproduce and pass on their genes to future generations. Fitness, in evolutionary terms, refers to an organism's ability to survive and reproduce successfully in a given environment. It is not necessarily related to physical strength or lifespan.
In the given options, option C states that not all organisms had the same natural lifespan, which is an incorrect interpretation of Darwin's concept of fitness. The correct answer is B) some organisms were more likely to reproduce, as Darwin's concept of fitness is directly linked to reproductive success. Organisms that are better adapted to their environment, have advantageous traits, and can successfully reproduce are considered more fit in terms of natural selection.
For question 21, the correct answer is A) Genetic variety slowly causes hundreds of species of beetles to form from a single species. This represents a disadvantage of asexual reproduction because asexual reproduction produces genetically identical offspring, which leads to less genetic variation within a population.
Regarding question 22, the correct answer is B) some organisms were more likely to reproduce. When Charles Darwin stated that some organisms were 'more fit' than others, he meant that certain organisms had traits or characteristics that made them more likely to survive and reproduce successfully in their environment. These advantageous traits would then be passed on to the next generation, increasing the overall fitness of the population.