Q: The simplest class of organic compounds is the what? Choices: - particles - Phenols - gas - hydrocarbons A:
hydrocarbons

(Question)
Q: What is the only substance on earth that is stable in all three states? Choices: - carbon - mercury - air - water A:
(Answer)
water

Ques: Q: The earliest cells were prokaryotes, surrounded by a cell membrane but lacking which key structure? Choices: - mitochondria - ribosomes - lysosomes - nucleus A:
Ans: nucleus

(Q).
Q: Global warming will raise ocean levels due to melt water from glaciers and the greater volume of what? Choices: - greenhouse gases - rainforests - rain - warmer water A:
(A).
warmer water

Ques:Q: What is the study of the similarities and differences in the embryos of different species? Choices: - example embryology - prenatal biology - diversified embryology - comparative embryology A:

Ans:comparative embryology

Q: What is the name for birds that live on water like ducks? Choices: - gamefowl - guineafowl - landfowl - waterfowl A:
waterfowl