Callose has what effect on pollen?
A. aids differentiation and attachment of pollen to the carpel
B. aids pollen development and helps pollen tubes to grow
C. aids pollen coat development
D. aids pollen coloration
E. aids the separation of pollen grains from the anther
B. aids pollen development and helps pollen tubes to grow
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Microfilaments are assembled from the protein ____
a. keratin b. myosin c. laminin d. actin e. tubulin
In the depiction of the cell cycle in the figure above, what does step 2 represent?
a. a pair of homologous chromosomes in G1. b. two chromosomes in anaphase. c. a pair of duplicated homologous chromosomes in G2 d. the entire genome of the organism. e. a chromosome in telophase.
Arthropods with mandibles, gills, excretory glands, and statocysts are the:A
insects. B. spiders. C. scorpions. D. crustaceans. E. mites.
Chemokines are adhesion molecules found on surfaces of leucocytes and play a crucial role in the recruitment of leukocytes to the sites of inflammation .
a. true b. false