Erwinia carotovora is a species of bacteria that uses injectisomes to inject proteins into plant cells, ultimately causing tissue rot. E. carotovora is an example of a:

A. mutualist
B. pathogen
C. predator
D. decomposer
E. producer


B. pathogen

Biology & Microbiology

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Endosperm is found in:

A. angiosperms B. gymnosperms C. ferns D. mosses E. horsetails

Biology & Microbiology

Which mechanism(s) increase(s) genetic diversity?

a. crossing-over between chromosomes during meiosis only b. independent assortment of chromosomes during meiosis only c. random DNA mutations only d. crossing-over between chromosomes and independent assortment of chromosomes during meiosis only e. crossing-over between chromosomes, independent assortment of chromosomes during meiosis, and random DNA mutations

Biology & Microbiology

Thermoreceptors detect

a. chemical substances. b. pressure changes. c. temperature changes. d. light wavelengths. e. changes in solute concentration.

Biology & Microbiology

What are the three stages of photosynthesis? Which stages require light and which do not?

What will be an ideal response?

Biology & Microbiology