The observation that the bacteria genus Chlamydia contains species that can only survive as intracellular parasites supports which viral origin hypothesis?

A) Progressive

B) Regressive

C) Self-Replicating

D) Virus-first

The venom of black widow spiders (Latrodectus mactans) contains an enzyme that hydrolyzes lecithin to the phospholipid lysolecithin. The lysolecithin lyses red blood cells, destroying them.

Of these answer choices, which could be the cause of Down syndrome for an offspring? A. The mother's egg contained 22 chromosomes. B. The father's sperm contained 23 chromosomes. C.

Which of the following would be considered a limited resource in the lower depths of the ocean?

Which describes uniformitarianism? A. The rates of geologic processes slow down with time. B. Geologic processes are different over time. C. Geologic processes operating now are the same as those that operated in the past. D.

Will fluorite scratch penny why or why not

What are the three main components of biodiversity? a. Species diversity, species productivity, and species stability b. Genetic diversity, species abundance, and species evenness c. Species richness, species abundance, and species evenness d.

How can droughts lead to poverty and conflicts? Explain.

What would happen if you kept accelerating?

What are the symptoms of mumps

What is the difference between a specific and a nonspecific defense?