Contain structures that regulate and perform life functions.
Athletes tend to have lower resting heart rates<span> because training programs that build speed, fitness, muscle and endurance also train your heart muscles to pump a </span>higher<span> volume of blood with each heartbeat.</span>
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:
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The availability of glucose energy necessary for memory consolidation is most likely to be enhanced by stress hormones.
These hormones, as well as growth hormones, sex hormones, and glucagon, have such an influence on liver that glucose gets secreted into the bloodstream. Glucose is important for many things in our body, and memory consolidation is one of them.
It won't. Argon is an element found in the Group 8A also called as the noble gases. They are called as such because they do not react with other elements because their electronic configuration is very stable. This is because they already obey the Octet rule, which has to do with eight electrons occupying around the element. So, it is very rare to have reaction involving any of the noble gases.
