Question

Okay I need some serious help!! I suck at biology and I think i'm not going to do so good on this final test. I really need help but I don't know how willing you guys are to help me out but anyway I will post some of the questions in the comment box, I hope someone can help me... :)

Answer 1

1. Jason and Matt have developed a new computerized timer for recording race times. Which of the following would be the best way to confirm the timer's accuracy?

A. consistent testing conducted by a single person
B. first-person testimony from a variety of racers
C. independent testing, repeated in multiple trials
D. multiple publications of data in a wide range of media

I think this one is C

Answer 2

2. Phoebe is taking samples from a lake to determine how the populations of aquatic life change during the summer. Each week for a month she takes samples from different areas of the lake. Over the course of a month, she finds the marine life listed in the chart below. What should Phoebe change about her methodology to better address her question?

IMAGE LINK:
https://www.connexus.com/content/media/369615-8242011-124611-PM-2073751595.png

A. Collect samples more frequently than once a week.
B. Provide details about the creatures in the "other" category.
C. Take samples from the same location each time.
D. Use a more sophisticated net to collect smaller creatures.

I think this one mite be B? I'm not sure...

Answer 3

Which of the following best explains how hydrogen bonding affects the heat of vaporization for water?

A. The hydrogen bonds cause water to be highly attracted to other substances, thereby increasing the energy needed to separate and vaporize it.
B. The hydrogen bonds cause water to resist a change in temperature, thereby increasing the energy needed to vaporize it.
C. The number of hydrogen bonds in water increases the amount of H+ ions available, thereby decreasing the energy needed to separate and vaporize it.
D. The uneven pull of hydrogen bonds causes water molecules to repel each other, thereby decreasing the energy needed to vaporize them.

I think this one is D?

Answer 4

If slight differences in the structure of a particular RNA molecule made it more successful in getting nucleotides from its environment than other RNA molecules, what outcome is most likely?

A. This particular RNA molecule would attract nucleotides of other RNA molecules
B. This particular RNA molecule would become longer than other RNA molecules.
C. This particular RNA molecule would not have an advantage because it would run out of nucleotides nearby.
D. This particular RNA molecule would produce more copies of itself than would other RNA molecules.

I think this one is D?

Answer 5

Which of the following describes why phospholipids are better suited to forming the cell membrane than regular fats or steroids?

A. Their glycerol head allows them to bond easily with most other molecules.
B. Their phosphate group gives them a hydrophilic end.
C. Their three-pronged structure allows them to store large amounts of energy.
D. Their unique ringed structure provides them with the ability to regulate cell metabolism.

this one idk

Answer 6

It's easiest to answer your questions if you post them individually. That way, there's no confusion about which answers correspond to which questions. :D

Answer 7

oh okay

Answer 8

ill do that then

Answer 9

The answer is C. independent testing, repeated in multiple trials