The region at the end of a chromosome is termed the _______
A. centromere D. P arm
B. telomere E. Q arm
C. satellite
B
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What is a contributing factor to an estuary's high productivity? a. The large amount of primary producers
b. The small amount of predators. c. The biomass of detritivores. d. The trapping of nutrients in sediments.
Edith's checkerspot butterflies are considered "indicator species" because they
a. can determine the make up of the community of organisms through predation. b. are signals for the presence of predators that prey on the butterflies. c. are important signals of ecological change. d. are only present during certain seasons. e. indicate when food supplies are low by changing their behavior.
Experiments that attempt to simulate conditions on early Earth have produced results that hint at the possible origins of life. What have the experiments produced?
What will be an ideal response?
Animal cells have a(an) _______ matrix
Fill in the blank(s) with the appropriate word(s).