Mussels are molluscans and are freshwater animals. The change in the environment led to new traits of mussels, it underwent natural selection and the thick shells have high chances of survival.
<h3>What is natural selection?</h3>
Natural selection is a process of nature that eliminates the organism with less survival and unfit traits while selecting the organisms with better traits of survival in the altered conditions.
The arrival or the introduction of the crabs in the environment altered the previous habitat of the mussels and led to the adaptation of the better trait quality in the mussel species.
The trait of the thick shells underwent natural selection as they were favoured for the changed conditions. The mussel having thick shells have high chances of survival over thin-shelled mussels as the crab will find it hard to attack the thick-shelled mussels.
Therefore, option A. change in environment, option B. natural selection and option E. chances of survival are the correct statements.
Learn more about the natural selection here:
brainly.com/question/10715606
Answer:
pic 1 red giant, a star whose outer shell has expanded and cooled
pic 2: supernova, a shock wave produced by extremely high temperatures
pic 3: black hole, a high mass star that has collapsed from gravity
pic 4: white dwarf, a low mass star that has shed its outer layers
Explanation:
Their gravitational pull towards the planet?
Answer:The genetic code is based upon the reading of how many bases at a time? A. one. B. two. C. three. D. four.
The follicle is an integral part of the reproductive system of a woman. The follicle is composed of a cluster<span> of cells surrounding a single egg in the human female reproductive system which contains cilia to sweep the ovum to the uterus. Answer is follicle.</span>
