In what organisms would you find oxygen bound to hemoglobins? Select all correct choices
A. earthworms
B. horses
C. spiders
D. soybeans
E. frogs
A,B,C,D,E
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Which of the following is a plant cell type that
is commonly found in and gives support to vascular tissues?
a. sclerids b. fibers c. stomata d. parenchyma e. collenchyma
All animals use forms of the pigment retinal in their photoreceptors to absorb light energy. What vitamin is retinal synthesized from?
1.Vitamin A 2.Vitamin C 3.Vitamin D 4.Vitamin E
If a person is choking, the __________ maneuver can be used to expel food from their trachea. Fill in the blank(s) with the appropriate word(s)
Crossing-over is
A) the place on a homologous pair of chromosomes at which a physical exchange occurs. B) an extremely rare event. C) an event that only takes place during meiosis. D) the reciprocal exchange of homologous regions of chromatids. E) not useful in mapping genes.