The evolution of land organisms was not possible until enough ________ had been made by the early forms of aquatic life

A) ammonia B) carbon dioxide C) organic food D) oxygen gas


Answer: D

Biology & Microbiology

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During this phase of the cell cycle the nuclear membrane reforms around the chromosomes:

A. Metaphase B. Prometaphase C. Telophase D. Anaphase E. Prophase

Biology & Microbiology

Why do geneticists refer to the two sugar phosphate strands of DNA as "antiparallel"?

What will be an ideal response?

Biology & Microbiology

Self-thinning

A) is found only in populations of mobile organisms. B) occurs at high population densities. C) functions to increase the survival rate of all individuals in the population. D) is a type of scramble competition.

Biology & Microbiology

Selection of a successfully transformed plant cell requires several steps including growth in a selective media, checking for the gene of interest, and checking for phenotype. Propose a method of detecting a transfected gene's presence in a developing

organism. What will be an ideal response?

Biology & Microbiology