_______ is both selective and differential.
Fill in the blank(s) with the appropriate word(s).
MacConkey Agar
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In the construction of a phylogenetic tree, a ______ considers the overall similarities among a group of species without trying to understand their evolutionary history, whereas a ______ considers the possible pathways of evolution to find the best possible tree.
A. cladistic approach; phenetic approach B. phenetic approach; cladistic approach C. shared derived character; ancestral character D. ancestral character; shared derived character
The molluscs:
a. do not have a larvae stage. b. lack a digestive system. c. have bodies divided into segments. d. possess a soft body covered with a mantle. e. make a chitinous shell.
When a bacterium is introduced to a new environment with plenty of nutritional resources, binary fission will allow for rapid growth of the population (2-4-8-16-32-64 . . . etc.). However, there is usually a slight lag before the rapid growth begins. What is the best explanation for this lag period?
A. Binary fission becomes more and more efficient after each cell division. B. It takes time to induce and amplify the production of the enzymes needed for binary fission. C. Structural genes act more slowly than metabolic genes. D. It takes time for bacterial cells to duplicate enough organelles to digest new media. E. The new media contains compounds that turn on repressor proteins.
True or False: One theory states that the formation of the nuclear membrane was to separate the spliceosome in the nucleus from the ribosomes in the cytoplasm
a. TRUE b. FALSE