Bacteria that have a spherical shape are called ________
A) coccus
B) bacillus
C) spirillum
D) spheroid
A
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What was the niche filled by the first fish? a. Hunting in intertidal communities
b. Scavenging the ocean bottom. c. All of these choices. d. Feeding on photosynthetic surface organisms.
In the technique of embryo splitting, _____
a. two embryos are fused b. an embryo is split apart to form two identical individuals c. two sperm are used to fertilize a single egg d. two eggs and two sperm are used to form two embryos e. an embryo’s nucleus is removed and replaced with an adult embryo
Which element is considered a macronutrient needed by plants?
A. Manganese B. Iron C. Copper D. Potassium E. Boron
In former times, surgeons used small doses of curare to relax the patient's abdominal and other muscles during operations. Why did this compound work? What additional precautions do you think the medical staff needs to put into place when a patient is
under anesthesia? What will be an ideal response?