The broad, flat part of a leaf is called the ____, while the stalk that attaches the leaf to the stem is called the ____
a. stipule; petiole
b. blade; stipule
c. stipule; axil
d. petiole; axil
e. blade; petiole
e
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The two main biological activities in the Ca and Si cycles are the biosynthesis of shells and exoskeletal material as well as the mineralization of these materials in sediments
Indicate whether the statement is true or false.
Specialized outgrowths of the plant epidermis called ____ are hairlike projections, such as root hairs
a. cuticles b. protoplasts c. stomata d. trichomes e. bark
With sexual reproduction, two genes for the same trait that are slightly different are called __________. Fill in the blank(s) with the appropriate word(s)
A detectable variation in the genomes of different individuals of a population is known as:
a. DNA sequencing. b. DNA electrophoresis. c. DNA tandem repeats. d. a polymorphism. e. DNA profiling