Biodiversity is the total number of organisms in an ecosystem
Indicate whether the statement is true or false
FALSE
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Double fertilization produces a triploid tissue from
the union of a. one sperm nucleus and one female nucleus. b. two sperm nuclei and one female nucleus. c. one sperm nucleus and two female nuclei. d. two sperm nuclei and two female nuclei. e. one sperm nucleus and three female nuclei.
Most scientists believe that the lateral buds farthest from the top of a tree are the least inhibited from sprouting because they
A) are shaded by the top of the tree. B) receive the least light. C) produce gibberellins. D) receive the most cytokinins from the roots. E) are the most affected by gravity.
Contact dermatitis is a type (I/II/III/IV) hypersensitivity disorder
What will be an ideal response?
Alpha-fetoprotein concentration is important because it may indicate ____ when it is high or ____ when it is low.
A. IUGR; Neural Tube Defects B. Multiple Births; Neural Tube Defects C. Neural Tube Defects, IUGR D. Trisomy 18; Multiple Births E. Trisomy 21; Neural Tube Defects