Which of the following is not a characteristic exclusively found in animals?

A. multicellularity
B. chitin
C. collagen
D. gastrula


A,B

Biology & Microbiology

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The method of removing vegetative microbial life forms and debris to reduce contamination to safe levels is termed ________.

A. sterilization B. sanitization C. antisepsis D. disinfection E. decontamination

Biology & Microbiology

The offspring of a parental cross (P1) are called the F1, or ____________________

Fill in the blank(s) with correct word

Biology & Microbiology

Localized regions of plasma membranes that contain cholesterol and proteins involved in cell signaling are known as

A) gap junctions. B) arterial plaques. C) cadherin junctions. D) lipid rafts. E) plasmodesmata.

Biology & Microbiology

Sickle-cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cells that lose their original donut shape and form a sickle shape. People with this disorder suffer from low energy levels, blood clots, and strokes. This is an example of

a. a multifactorial trait. b. polygenic inheritance. c. pleiotropy. d. codominance

Biology & Microbiology