Q: What is the term for the average number of individuals in a population per unit of area or volume? Choices: - population diameter - population structure - Density group - population density A:
population density

(Question)
Q: What makes and stores pigments that give petals and fruit their orange and yellow colors? Choices: - sporozoans - protozoa - pores - chromoplasts A:
(Answer)
chromoplasts

Ques: Q: Energy from sunlight enters many ecosystems through what process? Choices: - multiplication - reproduction - isolation - photosynthesis A:
Ans: photosynthesis

(Q).
Q: Oscillations in the transcription of certain genes are at the heart of the molecular mechanisms underlying what biological rhythms? Choices: - metastasis rhythms - brain rhythms - reproductive rhythms - circadian rhythms A:
(A).
circadian rhythms

Ques:Q: In science, what is defined as a change in position? Choices: - gravity - speed - direction - motion A:

Ans:motion

Q: Fungi are unique in having cell walls made of what? Choices: - prokaryotic - Protein - lectin - chitin A:
chitin