Xylem tissue may contain each of these cell types, except which?
A. Rays
B. Sieve cells
C. Fibers
D. Vessel members
E. Tracheids
Answer: B
Biology & Microbiology
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A normal blood pressure for a man in his late forties is 130/82 mm Hg. Explain the two numbers and what they mean.
What will be an ideal response?
Biology & Microbiology
The homeotic gene Hoxc6 is the vertebrate version of ____, which determines the identity of the thorax in fruit flies
a. Dlx b. thoracia c. RHO d. CCR5 e. antennapedia
Biology & Microbiology
The heart condition caused by a Streptococcus infection is ____
a. endocarditis b. tachycardia c. myocarditis d. “blue babies” e. rheumatic fever
Biology & Microbiology
Maintaining a steady-state internal environment, despite a changing external environment, is called ________
A) heterostasis B) biofeedback C) homeostasis D) bioregulation
Biology & Microbiology