The largest volumetric component of trash collected on beaches will likely be:
a. metal.
b. plastic.
c. medical waste.
d. glass.
e. cigarette butts.
B
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Answer the following statements true (T) or false (F)
1. Genes that are expressed only when needed are called constitutive genes. 2. Polysaccharides, polypeptides, and nucleic acids are all examples of polymers. 3. During translation, amino acids are “activated” by attaching to an appropriate rRNA molecule. 4. The peptide bonds that hold amino acids together in protein molecules are examples of covalent bonds. 5. In double-stranded DNA molecules, the two strands are held together by hydrogen bonds.
According to Mendel, if a male that is homozygous for the dominant form (PP) of a trait is crossed with a female that is
homozygous for the recessive (pp) form of a trait, all offspring will show the ____ form of the trait. a. sex-linked b. dominant c. recessive d. codominant e. lethal
The basswood in Figure 35-3 is __________ years old
a. 0
b. 2
c. 3
d. 4
e. 5
A covalent bond is likely to be polar when _____
A) one of the atoms sharing electrons is more electronegative than the other atom B) the two atoms sharing electrons are equally electronegative C) carbon is one of the two atoms sharing electrons D) the two atoms sharing electrons are the same elements