An acid
A. has a value above 7 on the pH scale.
B. is a chemical that takes hydrogen ions from a solution.
C. has a value of 7 on the pH scale.
D. is a chemical that adds hydrogen ions to a solution.
E. All of the answer choices are correct.
D. is a chemical that adds hydrogen ions to a solution.
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Four of the five terms listed below describe sets of
chromosomes with extra numbers. Select the exception. a. polyploid b. tetraploid c. diploid d. triploid e. hexaploid
Place the events of parturition in the correct order.(1) Stretch-sensitive neurons send signals to the hypothalamus.(2) Oxytocin receptors increase in the uterus.(3) Prostaglandin levels increase.(4) Estradiol levels increase.(5) Oxytocin levels increase.(6) Uterine muscles start to contract.
A. 5,2,4,1,3,6 B. 4,2,1,5,6,3 C. 1,6,4,2,5,3 D. 1,2,4,5,3,6 E. 4,3,1,2,5,6
If a meteor impact or volcanic eruption injected a lot of dust into the atmosphere and reduced the sunlight reaching Earth's surface by 70 percent for one year, which of the following marine communities most likely would be least affected?
A) deep-sea vent B) coral reef C) intertidal D) pelagic E) estuary
The largest of the viruses are similar in size to some small bacteria and are large enough to be seen with a light microscope.
Answer the following statement true (T) or false (F)