Q: Of the nine classes of vertebrates, how many are fish? Choices: - one - four - three - five A:
five

(Question)
Q: Echinoderms are marine organisms that make up which phylum? Choices: - annelida - chordata - cnidaria - echinodermata A:
(Answer)
echinodermata

Ques: Q: Humans have an estimated 20,000 to 22,000 of what units of heredity? Choices: - eggs - cells - chromosomes - genes A:
Ans: genes

(Q).
Q: What is the only commercial way of reproducing plants such as orchids? Choices: - sexual reproduction - cross-breeding - grafting - cloning A:
(A).
cloning

Ques:Q: About one-fourth of the blood pumped with each heartbeat enters arteries serving what organs of digestion? Choices: - stomach - bowels - lungs - intestines A:

Ans:intestines

Q: What decay produces helium nuclei? Choices: - Beta Decay - duo decay - radiative decay - alpha decay A:
alpha decay