Amedical researcher used a tube to remove some of the liquid from a person's stomach. the researcher put the liquid into a flask which had a peice of boiled beef in it. the beef was digested in six hours.

a. what type of substance in the liquid from the stomach caused the beef to be digested?

b. the researcher kept the flask at 37 degress celcius. explain why.

c. in the human body, the digestion of protein in meat begins in the stomach and is completed in the small intestine.

(i) what is digested protein used for in the body?

(ii) describe how the products of digestion get from inside the small intestine to the cells in the rest of the body.

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organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

c

explanation:

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate