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Questions in biology
[Answered] A cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. Purple offspring result due to incomplete dominance. Then, two of the purple offspring are crossed. What proportion of the offspring from the second cross will be purple? A. 1 in 4 B. 2 in 4 C. 3 in 4 D. 4 in 4
[Answered] A hypothesis must be A. changed B. scientific C. testable D. controlled
[Answered] What is the name of the biomolecule comprised of amino acids? A. Protein B. Carbohydrate C. Lipid D. Vitamin
[Answered] Horses and zebras can be bred to produce a zorse, which is infertile. Which is most likely the reason zebras and horses are considered separate species? A. They cannot breed. B. Their offspring cannot breed. C. They look different from each other. D. They are found in different habitats.
[Answered] What best explains the relationship between structure and function of the cell membrane? A. The single-layer membrane surrounding the outside of the cell allows for the easy removal of waste. B. The lipids and proteins that make up the membrane allow it to be selective about what enters and leaves the cell. C. The fluid inside the membrane buffers the chemical reactions taking place inside the cell. D. The lipids forming the membrane provide energy for protein synthesis.
[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
[Answered] Venous blood circulation is assisted by the contraction of skeletal muscles. True False
[Answered] Which of the following do NOT factor into determining an individual's biological sex? A. social differences B. anatomical differences C. psychological differences D. genetic differences
[Answered] Which level of organization is best represented by the liver? A. tissue B. organ C. organism D. organ system
[Answered] What are muscles made of? A. Ligaments B. White blood cells C. Fibers D. Blood vessels
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