Sponges are
A. prokaryotic bacteria.
B. the simplest animals.
C. the most complex protists.
D. plants.
E. not alive.
B. the simplest animals.
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A) deer B) soil C) snail D) free living stage
Which of the following is the most commonly used stop codon in most mRNA molecules?
A) UGA B) AUG C) AAA D) GAA E) CAG
Scientific discoveries have provided evidence that the ________ systems are involved in behavior.
A. respiratory and digestive B. endocrine and nervous C. excretory and circulatory D. digestive and reproductive
Which of the following protects bacteria from lysis in dilute solutions and helps to determine their cellular morphology or shape?
A. Plasma membrane B. Capsule C. Peptidoglycan D. Gas vacuoles