Q: Plants and algae maintain the atmosphere. during photosynthesis, they add oxygen and remove what? Choices: - water - nitrogen - methane - carbon dioxide A:
carbon dioxide

(Question)
Q: Extended stays in zero gravity are not healthy for human beings. thus, for the comfort of the astronauts, the station is rotated so that the astronauts feel there is what? Choices: - revealed gravity - still gravity - Fixed Gravity - internal gravity A:
(Answer)
internal gravity

Ques: Q: Which type of membrane are ribosomes surrounded by? Choices: - partial - permenant - temporary - none A:
Ans: none

(Q).
Q: Glycolysis, the krebs cycle, and the electron transport chain are stages in what process? Choices: - cell death - reproduction - mitosis - aerobic cellular respiration A:
(A).
aerobic cellular respiration

Ques:Q: Mammals are endothermic vertebrates that have four limbs and produce what type of eggs? Choices: - gymnoic - umbilical - epithelial - amniotic A:

Ans:amniotic

Q: Which currents distribute heat around the planet and have a large impact on climate? Choices: - air - electrical - wind - surface A:
surface