What features of a desert ecosystem control the communities which can survive in a desert?

A. amount of light
B. temperature
C. amount of water
D. All answers are correct.
E. amount of usable habitat


Answer: D. All answers are correct.

Biology & Microbiology

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Sister chromatids begin attaching to spindle fibers during which phase?

a. prophase b. prometaphase c. metaphase d. anaphase

Biology & Microbiology

Error bars on a graph indicate ____

a. places where the data is likely wrong b. places where the researcher is unsure of her results c. variation in results that cannot be accounted for. d. variation in a set of data around the average e. poor experimental technique on the part of the researcher

Biology & Microbiology

How does a gene tree differ from a species tree?

A) A gene tree shows the relationships among all the genes in a species genome, whereas a species tree shows the relationships among species. B) A gene tree is based on gene sequences, whereas a species tree is based on morphological features of each species. C) A gene tree is a phylogeny of individual genes, and can include multiple genes from a single species and/or samples of the same gene from multiple species; in a species tree, each species is represented by only a single branch. D) A gene tree is a subcategory of species tree, in which the data used to create the tree comes from gene sequences.

Biology & Microbiology

The group of bacteria that can be described as being normal inhabitants of soil and water and primarily responsible for the decomposition of plant material is:

a. Rhodococcus. b. Nocardia. c. Gordonia. d. Tsukamurella.

Biology & Microbiology