Phylogenetic trees are built using:
a) similarities in the physical structure of organisms.
b) similarities in the embryological development of organisms.
c) similarities in the DNA sequences of organisms.
d) tissue samples.
e) a), b), and c) are all correct.
Answer: e) a), b), and c) are all correct.
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Answer the following statements true (T) or false (F)
1. An understanding of cellular biology is helping us find new treatments for many diseases. 2. The reason that mitochondrial DNA in most mammals is inherited from the mother only is because a sperm cell contains no mitochondria. 3. All living cells have a cell wall. 4. The Woese system of classification consists of a broad taxonomic grouping of organisms called the domain. 5. Most living cells are small in size because they need a small ratio of surface area to volume.
The tube-like structures extending from these
bacterial cells in the picture above to the underlying cells in the above figure are used for a. attachment. b. locomotion. c. whipping up proteins. d. breathing. e. communication
Pollen grains develop in which structure?
a) the anther b) the stigma c) the filament d) the carpel
Which of the following describes the modern synthesis?
A. It is a coherent understanding of the relationship between natural selection and genetics B. It describes how natural selection can affect a population genetic make-up that can result in the gradual evolution of populations and species C. It connects the gradual change of a population over time with processes that give rise to new species and higher taxonomic group with widely divergent characteristics D. All of the above