The discovery of the first Homo erectus was based on the evaluation of two specimens. One was a skullcap and the other was a:
A. Mandible
B. Pelvis
C. Femur
D. Foot
E. Rib
Answer: C. Femur
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The hypothesis that mitochondria and chloroplasts originated from the phagocytic activity of prokaryotes that was not
followed by digestion is called the ____.
a. theory of natural selection b. endosymbiotic hypothesis c. ribozymes-first hypothesis d. Oparin-Haldane hypothesis e. stromatolite hypothesis
In the depiction of the cell cycle in the figure above, what does step 2 represent?
a. a pair of homologous chromosomes in G1. b. two chromosomes in anaphase. c. a pair of duplicated homologous chromosomes in G2 d. the entire genome of the organism. e. a chromosome in telophase.
What is the proper sequence of air flow in the human respiratory system?
1.nasal cavities, larynx, pharynx, bronchi, trachea 2.nasal cavities, pharynx, bronchi, larynx, trachea 3.nasal cavities, pharynx, larynx, trachea, bronchi 4.nasal cavities, larynx, pharynx, trachea, bronchi 5.nasal cavities, bronchi, larynx, trachea, pharynx
Resource partitioning can often be seen in similar species that occupy the same geographic area. These species avoid competition by living in different portions of the habitat or by utilizing different food or other resources. They are referred to as being ________.
A. exploitative B. competitive C. allopatric D. sympatric E. fundamental