Mitochondria and chloroplasts are thought to have once been free-living bacteria that invaded another cell

Indicate whether this statement is true or false.


TRUE

Biology & Microbiology

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Which of the following is (are) unique to animals?

A) cells that have mitochondria B) the structural carbohydrate, chitin C) nervous system signal conduction and muscular movement D) heterotrophy E) flagellated gametes

Biology & Microbiology

The gram-negative coccus that can be described as oxidase-positive, glucose-negative, maltose-negative, sucrose-negative, lactose-negative, and DNase-positive is:

a. N. meningitidis. b. M. catarrhalis. c. Neisseria cinerea. d. N. gonorrhoeae.

Biology & Microbiology

Prostaglandins are

a. protein molecules that act either by paracrine or autocrine mechanisms. b. fatty acid derivatives that act either by paracrine or autocrine mechanisms. c. neurotransmitters that act by paracrine mechanisms. d. amine molecules that act by neuroendocrine mechanisms. e. steroid molecules that are lipid soluble.

Biology & Microbiology

The Kissimmee River Restoration Project is intended to

A) drain natural wetlands in the central Florida region. B) increase biodiversity of the region. C) restrict ecotourism and other recreational usage in the impacted region. D) provide areas for homes and businesses.

Biology & Microbiology