The ____ components of blood are involved in the formation of clots
a. albumin and fibrinogen
b. albumin and leukocytes
c. fibrinogen and erythrocytes
d. fibrinogen and platelets
e. platelets and albumin
ANSWER: d
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What would occur if humans reproduced by parthenogenesis?
a. Males would need to produce more sperm. b. External fertilization would be necessary. c. The number of females in the population would most likely increase. d. The population would not reproduce asexually. e. No gametes would be produced
Fragments of DNA have been extracted from the remnants of extinct woolly mammoths, amplified, and sequenced. These can now be used to _____
A) introduce certain mammoth traits into relatives, such as elephants B) clone live woolly mammoths C) appreciate the reasons why mammoths went extinct D) better understand the evolutionary relationships among members of related taxa
Painful swelling, partly due to accumulation of gas, and rapidly spreading subcutaneous tissue necrosis is characteristic of a wound infection by
A. Clostridium perfringens. B. Clostridium tetani. C. Mycobacterium leprae. D. Bacillus anthracis. E. Streptococcus pyogenes.
At the end of this experiment two layers are formed in the tube. Where will the DNA be?
A) In the aqueous mixture at the bottom of the tube. B) At the interface between the two layers. C) In the alcohol layer at the top of the tube.