Support the argument that species in the grass family, Poaceae, are the most important seed plants today
What will be an ideal response?
ANSWER: Today, species in the grass family arguably are the most important seed plants because
they produce cereal grains—wheat, corn, rice, oats, sorghum, and barley—that provide the majority of calories humans consume. They and other domesticated grasses also nourish
people indirectly as feed for livestock and poultry. Sugarcane is a grass that provides 80%
of the global sugar supply. Bamboos are fast-growing grasses used for everything from
food and building materials to musical instruments.
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Which three of the following groups are most commonly used to covalently modify an enzyme and its activity? (Check all that apply.)
A. Hydroxyl group B. Phosphoryl group C. Methyl group D. Adenyl group
Which is the MOST toxic form of mercury?
A) CH3Hg+ B) Hg0 C) Hg2+ D) Hg4+
The closest modern relatives of birds are _____
a. crocodilians c. turtles b. prosimians d. lizards
How does phytochrome control flowering?
A) by disrupting the plant's photoperiod B) by detecting differences in temperature in the spring C) by sensing sunrise and sunset D) by inducing differentiation of cells in the apical meristem