The phylum Echinodermata , which contains about 6000 species, gets its name from the Greek, literally meaning "spiny skin." Many echinoderms actually do have "spiny" skin, but others do not. This phylum exists exclusively in the sea, and cannot be found on land or in fresh water. All echinoderms have one thing in common: radial symmetry. This means that the creatures have appendages (or body construction) which point outward from the center of the body like the spokes on a bicycle wheel. Furthermore, these appendages usually occur in multiples of five, although there are a few exceptions. There are several well known members of this group, like sea stars and sea urchins. The radial symmetry is obvious in these creatures.
Answer:
If Jimmy works better with someone other than Joe, then Joe is a part of the problem of Jimmy getting lower grades.
b responding variable
Explanation:
If, then statements are used for scientific hypothesis's.
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Infectious diseases<span> are those that are </span>transmitted<span> from person to person by direct or indirect contact. Viruses, bacteria, parasites, and fungi all cause infectious </span>disease<span>. Malaria, measles, and respiratory illnesses are examples of infectious </span>diseases<span>.</span>
1. The appearances of fireflies at dusk is an example of a circadian rhythm because it's happens daily. The correct option among all the options that are given in the question is the third option or option "c".
2. During migration, animals undertake a seasonal movement. The correct option among all the options that are given in the question is the first option or option "a".
Answer: Experimetal ablation
Explanation: Experimental abaltion
It can be defined as the most common procedure that is used by the scientists in his laboratory. This procedure includes the removal or destruction of a part of brain for studying the functions of the regions of brain.
Then the behavior of the animal is observed to see which part of the brain is responsible for which type of behavior. This can be an unethical practice so it is not used on human beings and is only used in animals.
