Oxygen-16 is abundant and has 8 protons and 8 neutrons. Oxygen-18 has two extra neutrons. These two forms are:
A. oxygen isotopes.
B. oxygen ions.
C. oxygen isomers.
D. oxygen dimers.
Answer: A
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Cleft palate is ____
a. controlled only by genetics b. a continuously distributed trait c. controlled by a single gene pair d. only transmitted from father to son e. explained by the threshold model of complex traits
To exert its effects on gene regulation in a cell, a steroid hormone must interact with a variety of proteins and cell structures along the way. Check the box for each interaction partner.
_____ carrier protein _____ microtubules _____ plasma membrane _____ hormone receptor _____ nuclear membrane _____ GPCR Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about steroidhormones? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Somatic cell nuclear transfer is used to create human embryos for research purposes in ____
a. embryo cloning b. embryo splitting c. therapeutic cloning d. artificial twinning e. stem cell cloning
Both bone and blood are types of connective tissue.
a. true b. false