Which elements are often most limiting for plant growth?
a. carbon, nitrogen, oxygen
b. carbon, potassium, sodium
c. carbon, sodium, chlorine
d. nitrogen, oxygen, hydrogen
e. nitrogen, potassium, phosphorus
Ans: e. nitrogen, potassium, phosphorus
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The most common way to follow bacterial transformation with a plasmid is by
A. manufacturing the bacterial protein. B. conferring antibiotic resistance. C. separating the altered cell surface. D. making the cells immortal. E. altering the physical appearance of the cells.
Which of the following statements is NOT true of lophophorates?
A. Their tentacles serve both in respiration and in feeding. B. They have a U-shaped digestive tract. C. They have a true coelom. D. There are three phyla of them: Phoronida, Bryozoa, Brachiopoda. E. They are parthenogenetic.
Plantae Terrestrial, multicellular, photosynthetic organisms
Anthophyta Vascular plants with flowers, fruits, and seeds Monocotyledones Monocots. Flowering plants with one seed leaf (cotyledon) and flower parts in threes Commelinales Monocots with reduced flower parts, elongated leaves, and dry 1-seeded fruits Poaceae Grasses with hollow stems; fruit, a grain; and abundant endosperm in seed Zea Tall annual grass with separate female and male flowers mays Only one species in genus -- corn . Based on the accompanying table, one characteristic used at the class level of classification for corn is: a. separate male and female flowers. b. the presence of a single seed leaf. c. flower parts in fours or fives. d. flowering vascular plants. e. tall annual grasses.
Chromosomes are composed of two chromatids during
A. gap 1. B. telophase. C. metaphase. D. anaphase.