Abnormally folded proteins that cause normal proteins to midfold are called

A) prions
B) nucleotides
C) peptides
D) polymers
E) triglycerides


Answer: A) prions

Biology & Microbiology

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A biologist uses a time machine to collect living material from 2 different time periods. Sample A is 3 billion years old and sample B is 1.5 billion years old. How would these samples differ?  

A.  Prokaryotic organisms would be abundant in sample A but absent from sample B. B.  Eukaryotic organisms would be present in both samples but much more common in sample B. C.  Prokaryotic organisms would only occur in sample B. D.  Eukaryotic organisms would be absent from sample A.

Biology & Microbiology

The algal ancestors of land plants are most likely similar to the ____

a. Rhodophyta b. Phaeophyta c. Chrysophyta d. Charophyta e. Radiolaria

Biology & Microbiology

New ecological roles that were not previously exploited by an ancestral organism are referred to as:

a. paedomorphosis. b. adaptive zones. c. punctuated equilibrium. d. adaptive radiation. e. sympatric speciation.

Biology & Microbiology

Amniotic eggs evolved as a means to

A. protect the embryo while the parent sits on the egg. B. protect the embryo from predators. C. prevent the embryo from drying out. D. allow the parent to gather food, not sit on the nest.

Biology & Microbiology