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Cacti in the deserts of southwestern North America and some euphorbs of the deserts of Africa have barrel-shaped stems, short-lived leaves, and spines, yet these two types of plants are from different evolutionary lineages. This is an example of __________.

Plant photosynthesis and the consumption of plants by animals are both examples of what principle of biology?

According to the most widely accepted hypothesis, the origin of the nuclear genome involved:

Homology refers to similarities among different species because

The concept of a molecular clock is based on which of the following?

Which of the following would be considered an example of a postzygotic isolating mechanism?

Which of the following is a way for sympatric speciation to occur? Movement of a segment of a population to a new island Polyploidy Geographic separation, such as a two populations on either side of a mountain range

5. Evolution only evolves traits that are good for the species as a whole.

Escherichia coli and Clostridium acetobutylicum are two species of bacteria. They have many similar, but not identical gene sequences. What is the best explanation for the differences in their genomes?

(12 pts) Cells Short Answer Section: The figure below represents an animal cell OR a plant cell OR a bacterial cell (exactly one of these!).  You need to know which one it is to answer all of the questions correctly.  Right answers for the wrong cell type won’t count.  ALL the matching questions should be answered with this same cell type in mind. Match the letters labeling components in the cell diagram, and boxes in the concept map below the cell diagram, to the appropriate answer choice.