The 46 chromosomes of the human genome contain approximately 500,000 genes.
a. true
b. false
b. false
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Which of the following provides support for the endosymbiotic theory?
A. Mitochondria and chloroplasts have only a single membrane surrounding them. B. Mitochondria and chloroplasts contain genes that are vastly different compared to bacterial genes. C. Mitochondria and chloroplasts have their own genomes. D. Mitochondria and chloroplasts cannot synthesize proteins. E. Mitochondria and chloroplasts contribute to similar metabolic processes in the eukaryotic cell.
Glands that lack ducts and secrete hormones are called ________
A) exocrine B) endocrine C) scent D) mammary
An excretory system that is partly based on the filtration of fluid under high hydrostatic pressure is the _____
A) flame bulb system of flatworms B) protonephridia of rotifers C) Malpighian tubules of insects D) kidneys of vertebrates
What category of organisms acquire both energy and carbon from complex organic compounds?
A. Chemoheterotrophs B. Chemoautotrophs C. Photoautotrophs D. Photoheterotrophs