Chapter 38, Problem 7
The black dots that cover strawberries are actually fruits formed from the separate carpels of a single flower. The fleshy and tasty portion of a strawberry derives from the receptacle of a flower with many separate carpels. Therefore, a strawberry is a. a simple fruit with many seeds. b. both a multiple fruit and an accessory fruit. c. both a simple fruit and an aggregate fruit. d. both an aggregate fruit and an accessory fruit.
Video transcript
Which statement concerning grafting is correct? a. Stocks and scions refer to twigs of different species. b. Stocks and scions must come from unrelated species. c. Stocks provide root systems for grafting. d. Grafting creates new species.
Some plant species produce male and female individuals in which the males have an XY genotype and the females have an XX genotype. After double fertilization, what would be the genotypes of the embryos and endosperm nuclei? (A) embryo XY/endosperm XXX or embryo XX/endosperm XXY (B) embryo XX/endosperm XX or embryo XY/endosperm XY (C) embryo XX/endosperm XXX or embryo XY/endosperm XYY (D) embryo XX/endosperm XXX or embryo XY/endosperm XXY
In a species showing sporophytic incompatibility, which type(s) of pollen could successfully fertilize an S2S3 flower? (A) S1 pollen from an S1S3 flower (B) S2 or S3 pollen from an S2S3 flower (C) S3 pollen from an S1S1 flower (D) S1 pollen from an S1S1 flower
DRAW IT Draw and label the parts of a flower.