The stamens of a flowering plant are broken down into two separate parts. The long, stalk-like structure is the _________ and the pollen-producing bodies on the tips are the __________.
a. stem; ovaries
b. filament; carpels
c. receptacle; sepals
d. filament; anthers
e. stem; anthers
Ans: d. filament; anthers
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a. down their concentration gradient b. toward equilibrium c. against their concentration gradient d. it depends on what is being transported
The fossil record represents _____ of the total species that have ever lived
1.90% 2.less than 1% 3.75% 4.50% 5.5%
During phagocytosis, what may fuse with the vacuole to further degrade the ingested material?
a. ligand b. receptor c. lysosome d. phosphate e. desmosome
Which statement best describes h2 (narrow-sense heritability)?
A) It measures the contribution genotypic variance to total phenotypic variance. B) The deviation from additive components when they behave epistatically. C) The proportion of phenotypic variance due to additive genotypic variance alone. D) The genotypic variance due to additive action of various QTLs.