Fire in the taiga
A) damages trees, resulting in excessively slow recovery due to low temperatures.
B) alters nutrient cycling, making nutrients unavailable for trees.
C) occurs often, resulting in decreased competition of vegetation adapted to repeated burning.
D) results in systems dominated by grassland species.
C
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During endocytosis, if a bacterial cell is not degraded and bacterial DNA is taken up by the eukaryotic cell, what may have occurred?
A. vertical evolution. B. horizontal gene transfer. C. vertical exon shuffling. D. chromosomal duplication and genomic exchange. E. both chromosomal duplication and vertical evolution.
Four elements, including ____, make up more than 96% of the mass of most living organisms
a. sodium b. potassium c. phosphorus d. nitrogen e. calcium
Gary and Stan are both about 6 ft tall and maintain a weight of 170 lb. Stan works at a desk and, for entertainment, watches a lot of movies. Gary also works at a desk and, for entertainment, plays on a soccer team
Who has a higher resting metabolism, and why? A) Because they are the same height and weight, their resting metabolisms are the same. B) Stan, because his fat cells burn more calories C) Gary, because his muscle cells burn more calories D) We need to know more about their dietary habits.
Fill in the blanks to complete the following statements. ? ______________ recognize antigens located on the pathogens' cell walls
Fill in the blank(s) with correct word