When does fertilization occur in flowering plants?
A) Pollen grains land on the anthers of the female flower parts.
B) The female carpels and male anthers are united.
C) Sperm join with eggs inside the ovules.
D) Pollen joins with eggs inside the stigma.
C
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High net primary productivity is a characteristic of what biome?
a. desert b. savanna c. chaparral d. tropical forest
The significance of totipotency is that:a
genes are not regularly lost during development. b. most organisms can be easily cloned. c. differentiation leads to the loss of certain genes in each cell. d. somatic cells are incapable of differentiation. e. unexpressed genes are lost during development.
What is the most critical hurdle using nonexperimental data must overcome?
A. Removing measurement error B. Overcoming high attrition rates C. Lack of the random assignment of the treatment D. Measuring outcomes effectively
The _____ of an antibody molecule functions to recognize and bind to a specific antigen
a. antigen-antibody complex b. antigen-binding site c. light chain d. heavy chain e. immunoglobulin motif