The hominid australopithecines are generally accepted to be different from modern humans because
A. human arms are longer than legs.
B. only humans are meat-eaters.
C. the human skull is apelike in appearance with a strongly projecting face.
D. only humans are bipedal.
E. human brains on an average are at least twice as large in size.
Answer: E
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A researcher is studying eukaryotic cells that shows an abnormal pattern of surface glycosylation. The researcher determines that these cells have normal levels of glycolipids and integral membrane proteins with O-linked glycosylation. The researcher discovers that there are no N-linked glycosylated proteins on the cell surface and unusually high levels of glycosylated in the ER membrane. What is a reasonable hypothesis to explain this observation?
A. The cell is defective in synthesizing of carbohydrates B. The cell is defective in assembling carbohydrate trees C. The cell has a defective oligosaccharide transferase D. The cell has a defect in its protein sorting pathway E. The cell has a defect in its ER localization signal
Which cells provide diversity for the immune response?
a. macrophages b. T and B cells c. dendritic cells d. complement cells e. neutrophils
Which of the following is an example of an allogenic change that drives succession?
A) seasonal changes in temperature, photoperiod, and light intensity B) increased shading of seedlings by adult trees in a forest C) increased nitrogen availability in soil due to the presence of leguminous plants D) reduced salinity due to surface shading by grasses in a salt marsh
The number of seeds produced by a plant is ________ correlated with the size of the seeds
Fill in the blank(s) with correct word