Which of the following represents a potential threat to biodiversity?
(a). People construct artificial reefs to support marine life.
(b). Humans clear land for agriculture and housing.
(c). Energy flows through an ecosystem, with much lost as heat.
(d). Tropical rain forests and coral reefs are found where solar energy is the most abundant.
(e). In a food chain, one population feeds on another.
(b). Humans clear land for agriculture and housing.
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Adult tunicates resemble __________ and are __________
a. eels; carnivorous. b. corals; photosynthetic c. starfish; carnivorous d. sponges; filter feeders e. earthworms; detritivores
Molecular data shows that land plants and charophytes
A. are in the same clade and form a monophyletic group. B. are in different clades but form a monophyletic group. C. do not share common ancestry. D. are in different clades and form a polyphyletic group. E. are in the same clade but form a polyphyletic group.
You have identified a mutant in human cells that when shifted to 37°C, the microfilaments depolymerize (fall apart). Which of the following would be true about this mutant at 37°C?
A) The endoplasmic reticulum could still import polypeptides but could no longer synthesize lipids. B) The sister chromatids would no longer be attached to each other. C) The cells would no longer be able to produce ATP. D) The mitochondria would no longer work. E) The cells would change shape.
________ is the process in which a single diploid cell divides to produce haploid reproductive cells
Fill in the blank(s) with correct word