Q: The frequency of sound waves is measured in what unit? Choices: - watt - rads - decibel - hertz A:
hertz

(Question)
Q: Overharvesting is a serious threat particularly to which species? Choices: - aerial species - amphibious species - terrestrial species - aquatic species A:
(Answer)
aquatic species

Ques: Q: An atom that gains or loses electrons is called what? Choices: - photon - quark - isotope - ion A:
Ans: ion

(Q).
Q: What is the term for a symbiotic relationship in which the parasite benefits while the host is harmed? Choices: - infection - reciprocity - pathology - parasitism A:
(A).
parasitism

Ques:Q: Excretory organs that conserve what essential substance help terrestrial animals to avoid desiccation? Choices: - metabolytes - air - food - water A:

Ans:water

Ques:Q: The diapsids diverged into two groups, the archosauromorpha ("ancient lizard form") and the lepidosauromorpha ("scaly lizard form") during what time period? Choices: - holocene - cenozoic - paleozoic - mesozoic A:

Ans:
mesozoic