(Q).
Answer the following question given this paragraph: Deleting or inserting a nitrogen base causes a frameshift mutation. All of the codons following the mutation are misread. This may be disastrous. To see why, consider this English-language analogy. Take the sentence "The big dog ate the red cat. " If the second letter of "big" is deleted, then the sentence becomes: "The bgd oga tet her edc at. " Deleting a single letter makes the rest of the sentence impossible to read. Q: Deleting or inserting a nitrogen base causes what? Choices: - a placentation mutation - a degenerative mutation - a photoinhibition mutation - a frameshift mutation A:
(A).
a frameshift mutation

(Q).
Answer the following question given this paragraph: Another interesting feature of many cnidarians is the ability to produce light. The production of light by living things is called bioluminescence. A more familiar example of bioluminescence is the light produced by fireflies. In cnidarians, bioluminescence may be used to startle predators or to attract prey or mates. Watch this short video to see an amazing light show put on by a jellyfish at the Monterey Aquarium in Monterey, California: https://www. youtube. com/watch?v=kdufLq2P1Ag . Q: The production of light by living things is called what? Choices: - apoptosis - attenuation - bio-glow - bioluminescence A:
(A).
bioluminescence

(Q).
Answer the following question given this paragraph: The first and longest phase of mitosis is prophase . During prophase, chromatin condenses into chromosomes, and the nuclear envelope, or membrane, breaks down. In animal cells, the centrioles near the nucleus begin to separate and move to opposite poles (sides) of the cell. As the centrioles move, a spindle starts to form between them. The spindle, shown in Figure below , consists of fibers made of microtubules. Q: What is the first phase of mitosis? Choices: - metaphase - telophase - meiosis - prophase A:
(A).
prophase