The morphology of plants is determined
A. by cell division at the tip of the shoots and cell elongation at the tip of the roots
B. by cell division at the tip of the roots and cell elongation at the tip of the shoots
C. by cell elongation at both the tip of the shoots and the roots
D. by cell death (apoptosis) along the radial axis
E. by cell division at both the tip of the shoots and the roots
E. by cell division at both the tip of the shoots and the roots
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Which two cellular organelles in eukaryotes have both electron transport systems and chemiosmotic mechanisms?
a. Ribosomes and endoplasmic reticulum b. Chloroplasts and endoplasmic reticulum c. Chloroplasts and mitochondria d. Mitochondria and nuclei e. Nuclei and Golgi apparatus
Based upon the kind of aggression exhibited by male crickets, Alexander (1961) classified the cricket encounters into ______ levels.
A. Three B. Four C. Five D. Six
What protective substance(s) of the skin is/are capable of breaking down the cell walls of certain bacteria?
a) Perspiration b) Antimicrobial peptides c) Sebum d) Lysozyme
Innate effector phagocytes are coated with opsonin receptors and receptors to pathogen-associated molecular patterns (PAMPs). These PAMP receptors are collectively called:
a. PRRs b. complement receptors c. TLRs d. LPS receptors