Which time period of Earth represents when evolution was progressing at the most rapid rate, as evidenced by fossils
such as those of the Burgess Shale?
a. Silurian period
b. Cambrian period
c. Devonian period
d. Ordovician period
e. Carboniferous period
ANSWER: b
You might also like to view...
In humans, one pair of pharyngeal pouches become the tube-shaped organ called the
A. esophagus. B. trachea. C. Eustachian tube. D. bronchial tube. E. pharynx.
What is the scientific term for when a plant loses its leaves in the fall, and which hormone triggers this response?
a. thigmotropism, cytokinin b. photomorphogenesis, gibberelins c. abscission, auxins d. dormancy, abscisic acid
You are attempting to link an individual to a crime. The only evidence you have is a tiny drop of blood. How can you use this drop of blood to definitively make the association?
A) You can use the sample to determine the individual's blood type. B) You can use gel electrophoresis to determine the length of the DNA found in the sample. C) You can use PCR to increase the amount of DNA available for STR analysis. D) You can use the sample to check for the presence of the Rhesus factor.
A fungal species which can grow in varied climates and under diverse conditions is termed
A) microbiotic. B) endemic. C) normal. D) ubiquitous. E) mycosis.