Will give dont answer unless you know the
question 1(multiple choice worth 3 points) (06.01 hc)
a team of scientists altered the dna of pseudomonas bacteria. the bacteria thus developed had the ability to eat up oil. what could be the likely impact of this biotechnology on the environment and the society?
a. toxic gases would be released, causing large-scale pollution.
b. damage to marine flora and fauna due to oil spills could be prevented.
c. the consumption of nonrenewable energy sources would be increased.
d. the process of oil exploration would become simpler and more economical.
question 2(multiple choice worth 3 points) (05.04 mc)
which of the following adaptations in wooly mammoths could have best prevented their extinction?
shedding of fur
a. darker color of fur
b. growth of an extra layer of fur
c. increase in the thickness of fur
question 3(multiple choice worth 3 points) (06.04 mc)
a student wants to compare how easily a metal and a plastic spoon of the same temperature can transfer thermal energy. which of the following activities should the student perform?
a. measure the effort required to bend each spoon.
b. place an ice cube on each spoon and record the rate of melting of the cubes.
c. place the spoons at room temperature and record the change in temperature of each.
d. measure the change in weight of the spoons after placing them in the freezer for a few minutes.
question 4(multiple choice worth 3 points) (06.04 mc)
the characteristics of certain cell divisions are described in the following table. cell division characteristics characteristic description 1 takes place in skin cells 2 forms cells that are identical to parent cell which type(s) of cell division do the two characteristics represent?
a. both characteristics represent meiosis.
b. both characteristics represent mitosis.
c. characteristic 1 represents meiosis and characteristic 2 represents mitosis.
d. characteristic 1 represents mitosis and characteristic 2 represents meiosis.
question 5(multiple choice worth 3 points) (06.03 lc)
which of the following is used to represent a dominant trait in a punnett square?
a. an uppercase letter
b. a lowercase letter
c. a shaded square
d. a shaded circle
question 6(multiple choice worth 3 points) (05.04 mc)
four animals live in the arctic. their characteristics are described in the following table. animal characteristics a long tail b small feet c black fur d white skin which animal is least likely to be captured by its enemies?
a. animal a
b. animal b
c. animal c
d. animal d
question 7(multiple choice worth 3 points) (06.03 lc)
which of the following is an example of a homozygous dominant allele?
a. wr
b. rr
c. rr
d. rw
question 8(multiple choice worth 3 points) (06.02 mc)
which of the following personal health practices should a person follow to reduce the risk of skin cancer?
a. avoid staying outdoors when the sun is strongest.
b. consume antibiotics to prevent bacterial attacks.
c. wash hands frequently to maintain proper hygiene.
d. have a balanced diet and exercise regularly.
question 9(multiple choice worth 3 points) (06.03 mc)
cystic fibrosis is a recessive gene disorder. the pedigree chart for a family known to have cystic fibrosis is shown below. what percentage of the offspring neither have the disease nor are carriers for the disease?
(i know the answer)
a. 0%
b. 25%
c. 50%
d. 75%