The structures present in the hay infusions used in experiments on spontaneous generation that made them difficult to sterilize are

A. chlorophyll.
B. toxins.
C. organelles.
D. endospores.


D

Biology & Microbiology

You might also like to view...

By nature of its infectivity, M13 phage can be used in the laboratory to continually propagate a particular DNA sequence inside of Escherichia coli by simply culturing infected E. coli in LB

Indicate whether the statement is true or false.

Biology & Microbiology

Nearly ALL cases of acute listeriosis require hospitalization

Indicate whether the statement is true or false.

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

Hair color (or lack of it) is mostly due to:

A) sweat gland pigments. B) sebaceous gland pigments. C) activity of melanocytes. D) a colored version of keratin.

Biology & Microbiology