Plants can close tiny gaps in their epidermis, referred to as ____, to limit water loss from internal tissues
a. periderm
b. stomata
c. endoderm
d. tracheids
e. sclereids
ANSWER: b
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Scaffolding proteins are _____
A) ladderlike proteins that allow receptor-ligand complexes to climb through cells from one position to another B) microtubular protein arrays that allow lipid-soluble hormones to get from the cell membrane to the nuclear pores C) large molecules to which several relay proteins attach to facilitate cascade effects D) relay proteins that orient receptors and their ligands in appropriate directions to facilitate their complexing E) proteins that can reach into the nucleus of a cell to affect transcription
Which of the following is in the correct sequence?
a. the origin of self-replicating molecules -> the abiotic synthesis of small molecules -> the abiotic synthesis of polymers -> packaging of molecules into protobionts b. packaging of molecules into protobionts -> the abiotic synthesis of small molecules -> the abiotic synthesis of polymers -> the origin of self-replicating molecules c. the abiotic synthesis of polymers -> the abiotic synthesis of small molecules -> packaging of molecules into protobionts -> the origin of self-replicating molecules d. the abiotic synthesis of small molecules -> the abiotic synthesis of polymers -> packaging of molecules into protobionts -> the origin of self-replicating molecules
Sexually transmitted chlamydia is similar to infection with Yersinia pestis in that they both can produce
A. urethritis. B. pelvic inflammatory disease in females. C. conjunctivitis. D. buboes. E. pneumonia.
Which phenomenon explains differences in the inheritance patterns of the appearance of a chin beard between males and females of certain species of goats, even when their genotypes are the same?