Q: Photoautotrophs use what energy source to self-manufacture their own food? Choices: - water - chlorophyll - air - light A:
light

Q: What structure of a cell is enclosed by a membrane and contains most of the cell's dna? Choices: - vacuole - ribosome - epidermis - nucleus A:
nucleus

Q: What stage in human males lasts from about ages 12 to 18 years and is controlled by hormones? Choices: - childhood - adolescence - maturity - puberty A:
puberty