Complex tissues are tissues consisting of ____.
A. two or more cell types
B. only one cell type
C. only parenchyma cells
D. only collenchyma cells
E. only sclerenchyma cells
Answer: A
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In which of the following organisms is
genetically engineered human insulin produced?
a. pigs b. E. coli c. humans d. T. aquaticus e. B. thurigiensis
The area of the angle between the stem and the leaf stalk is referred to as the:a
axil. b. blade. c. petiole. d. stipule. e. trichome.
The acidity or alkalinity of a solution can be measured in terms of ________
Fill in the blank(s) with correct word
Which of the following generally makes skeletal muscle different from both smooth and cardiac muscle?
A) Skeletal muscles are made of cells called "fibers." B) Skeletal muscle cannot be contracted voluntarily. C) Skeletal muscle can be contracted voluntarily. D) Skeletal muscle cells have nuclei.