What is the role of the ribosome in protein production?
A) It reads the DNA to make an RNA molecule.
B) It folds the protein into the correct shape.
C) It is where proteins are made.
D) It has no direct role in protein production.
C
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Which of the following is a fitness trade-off (compromise)?
A) In some hornbill species, the male helps seal the female in a tree with her nest until the young are ready to fledge. B) Hummingbirds are the best pollinators of certain flowers, but bees are the best pollinators for orchids. C) The strong, thick beak of a woodpecker helps it find insects in trees. D) Turtle shells provide protection but are heavy and burdensome when moving.
A particular segment formed during normal Drosophila development
A. will always form the same structures in adult flies. B. can form different structures, depending on positional information received by the segment during early development. C. is only important to early developmental stages. D. will express different transcription factors in different individuals. E. will become ectoderm, endoderm, or mesoderm.
The mitral valve ____
a. lies between the left and right ventricles b. is found on the right side of the heart c. prevents blood from back flowing into the aorta d. lies between the left atrium and left ventricle e. closes when the left ventricle relaxes
Asexual reproduction by budding is represented by:
a. one arm of a starfish breaking off and forming a new individual starfish b. a single-celled diatom undergoing mitosis and cytokinesis to form two new equally sized daughter cells. c. a single-celled yeast undergoing mitosis and unequal cytokenisis to grow a small new cell that will break off to become a daughter cell d. a bacteria undergoing binary fission to create two new daughter cells e. a multicellular hydra growing a small new multicellular hydra that will break off to form a new, independent hydra f. a lizard's unfertilized egg developing into a new adult