The sharing of two pairs of electrons between two atoms is called a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).
double bond
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Calcification zone
What will be an ideal response?
What is a major role that fungi play in ecosystems?
A) Recycling nutrients from dead organisms back into the food chain B) Fixing carbon from the atmosphere C) Synthesizing glucose from carbon dioxide and water D) Photosynthesis
Which of the following statements is true regarding genomic imprinting?
A) It explains cases in which the gender of the parent from whom an allele is inherited affects the expression of that allele. B) It is greatest in females because of the larger maternal contribution of cytoplasm. C) It may explain the transmission of Duchenne muscular dystrophy. D) It involves an irreversible alteration in the DNA sequence of imprinted genes. E) All of the above are correct.
The breathing center in the brain is most sensitive to the
a. concentration of oxygen b. concentration of carbon dixoide in the lungs c. concentration of carbon dioxide in the blood d. amount of oxygen in the cells