Which species is believed to be the first creature to walk erect and possibly be the first hominin?
What will be an ideal response?
Ardipithecus kadabba
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The lac operon in E. coli shares many similarities with a pigment protein gene in a rose plant. What statement below is not true of both the lac operon and the pigment gene?
A. Both the operon and the pigment protein gene require promoters. B. The answer stating that both are multiple genes, and that the lac operon codes for lactose are incorrect. C. The lac operon codes for lactose, while the pigment gene codes for a protein. D. Both the operon and the pigment protein gene include the template DNA sequence. E. Both the operon and the pigment protein gene are made of multiple genes.
Which statement is true?
1.The hydrogen bonding of cytosine to guanine is an example of complementary base pairing. 2.Adenine always pairs up with guanine in DNA, and cytosine always teams up with thymine. 3.Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base. 4.When adenine base pairs with thymine, they are linked by three hydrogen bonds. 5.In the DNA of all species, the amount of cytosine never equals the amount of guanine.
After a moss spore germinates it forms a(n) prothallus
____________________ Indicate whether the statement is true or false.
Which of the following water features is(are) directly affected by eutrophication?
A. Lake Erie B. Gulf of Mexico C. Chesapeake Bay D. All of the above are correct. E. None of the above are correct.