Biology A Final Exam Practice – Flashcards
Unlock all answers in this set
Unlock answersquestion
What are the goals of science?
answer
1) to investigate the natural world
2) to explain natural phenomena
3) to make useful predictions based in evidence
question
During a controlled experiment, a scientist isolates and tests
answer
A single variable.
question
How are proteins, lipids, and polysaccharides similar?
answer
They are natural polymers composed of repeating monomeric units.
question
Which of the following statement is not true about enzymes?
answer
All enzymes have the same shape as their substrates.
question
Why is an organism's niche in a person's occupation?
answer
An organism can "make a living" and survive in its niche.
question
Which of the following occurs during the ecological succession of an ecosystem?
answer
Living organisms modify their environment a little at a time.
question
Suppose that a species of toads is introduced into a new environment in an attempt to reduce the population of insects. The toad has no natural predators in the new environment. The toad population would most likely
answer
Increase exponentially
question
A major factor that negatively affects biodiversity is
answer
Habitat magnification
question
Which of the following is not a principle of the cell theory?
answer
Very few cells are able to reproduce.
question
Looking at a cell under a microscope, you note that it is a prokaryote. How do you know?
answer
The cell lacks a nucleus
question
Which of the following organisms is a heterotroph?
answer
Mushroom
question
The energy of the electrons passing along the electron transport chain is directly used to
answer
Transport H+ ions.
question
Which of the following is a correct statement about the events of the cell cycle?
answer
Interphase consists of the G1, S, and G2 phases.
question
Which of the following is a correct statement?
answer
Gametes are formed by meiosis and are haploid, while body cells are formed by mitosis and are diploid.
question
Griffith's experiments advanced the study of genetics by proving that
answer
There is a chemical that contains genetic information that can be passed from one organism to another.
question
If nondisjunction occurs during mitosis,
answer
Some gametes may have an extra copy of some genes.
question
To produce transgenic bacteria that make insulin, which of the following steps listed below would a scientist do FIRST?
answer
Cut out the insulin gene from human DNA
