How is global warming related to the United States' and 7 other countries' presence in the Arctic?
a. Global warming has caused oil fields to dry up in temperate zones forcing the search in the Arctic
b. Thawing ice flows is opening shipping lanes and allowing greater access to the Arctic, which these countries are exploiting.
c. With global warming, people can work in the Arctic and be comfortable.
d. Thanks to global warming, it is now environmentally safe to have an extended hunting season on polar bears.
b
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Most dinosaurs died out by the end of the ____ period
a. Triassic b. Jurassic c. Cretaceous d. Quaternary e. Permian
The first fossils of animals date back to
approximately ___ million years ago.
a. 370 b. 420 c. 470 d. 520 e. 570
Select the hydrogen acceptor molecule that stores electrons in the process of photosynthesis:a
nicotinamide adenine dinucleotide (NAD+) b. nicotinamide adenine dinucleotide phosphate (NADP+) c. flavin adenine dinucleotide (FAD) d. adenine triphosphate (ATP) e. adenine diphosphate (ADP)
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
Using Table 23-1, all of the following characteristics are used to establish the family level of classification for corn except:a. grasses with hollow stems. b. fruit is a grain. c. large endosperm in the seed. d. one seed leaf. e. elongated leaves