Q: What is essential for cellular respiration for all aerobic organisms? Choices: - nitrogen - water - carbon - oxygen A:
oxygen

(Question)
Q: Why must values of specific heat be looked up in tables? Choices: - lack of formulas - difficult to memorize - difficult to understand - difficult to calculate A:
(Answer)
difficult to calculate

Ques: Q: Organisms tend to be larger in size at higher what levels? Choices: - proteolytic - benthic - Secondary Layer - trophic A:
Ans: trophic

(Q).
Q: Which blood leaves the placenta through veins leading back to the fetus? Choices: - immunity - molecular - pelvic - fetal A:
(A).
fetal

Ques:Q: Because force and electric field are what, they have direction as well as their value? Choices: - sensors - neurons - mass - vectors A:

Ans:vectors

Ques:Q: Water, carbon dioxide, and what other element are important agents of chemical weathering? Choices: - helium - methane - sulfur - oxygen A:

Ans:
oxygen