Which of the following has only one living species characterized by fan-shaped, deciduous leaves?
a. Conifers
b. Ginkophytes
c. Cycads
d. Gnetophytes
b. Ginkophytes
Ginkophytes have only one living species, Ginko biloba, characterized by its fan-shaped leaves that turn yellow and fall from the plant in autumn. They likely survived to the present-day because they were cultivated by Buddhist monks.
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Which component in the cell membrane restricts the passage of water-soluble substances?
a. sterols b. phospholipid c. protein d. glycolipids
According to research, which of the following improves the effectiveness of a conservation preserve?
a. surrounding the preserve with a buffer zone b. being shaped with multiple thin arms c. having small rather than large preserves d. including only a few species in each preserve
Which of the following would NOT be a
translocation sink?
a. developing fruit b. apical meristem c. root tips d. heartwood e. vascular cambium
Which of the following provides support for the endosymbiotic theory?
A. Mitochondria and chloroplasts have only a single membrane surrounding them. B. Mitochondria and chloroplasts contain genes that are vastly different compared to bacterial genes. C. Mitochondria and chloroplasts have their own genomes. D. Mitochondria and chloroplasts cannot synthesize proteins. E. Mitochondria and chloroplasts contribute to similar metabolic processes in the eukaryotic cell.