CHOICES Flashcards
How long does the blood cell live?
a. 1-2months
b. 2-3moths
c. 3-4 moths
d. 4-5months
C. 3-4 months
The total collection of genes in a population at any one time is called:
a. genome
b. genotype
c. gametes
d. gene pool
d. gene pool
When can we say that an ecosystem is managed?
a. When it is formed by natural phenomenon
b. If it is maintained by man
c. When it costs a lot
d. When it is beautiful
b. If it is maintained by man
How is a community formed?
a. Different individuals in an area
b. Aggregation of individuals of the same species
c. Group of species in a given space at a given time
d. Several different population interacting with its environment in given space at a given time
d. Several different population interacting with its environment in given space at a given time
What enables the chaparral plants to resprout again after a fire has occurred?
a. They have food reserve in their roots
b. They have long roots that holds them to the ground
c. They have fire-proof bark that protects them from fire
d. All of the above are correct
a. They have food reserve in their roots
Why is lightning said to contribute in the nitrogen cycle?
a. It makes the nitrifying bacteria faster and stronger by supplying light.
b. It supplies energy needed for chemical reaction of nitrogenous material in the
atmosphere.
c. It makes plant more photosynthetic.
d. It nourishes the soil with charged particles.
b. It supplies energy needed for chemical reaction of nitrogenous material in the
atmosphere.
What did Mendel do to ensure that he had pure-breeding plants for his experiments?
a. He removed the male parts of the plants
b. He removed the female part of the plants
c. He cross-fertilized each variety with each other
d. He allowed each variety to self-fertilized for several generations
d. He allowed each variety to self-fertilized for several generations
The use of radioactive isotopes fall under:
a. relative dating
b. absolute dating
c. homologue analysis
d. comparative genomics
b. absolute dating
What will be the effect of too much Antidiuretic hormone in the blood?
a. The kidneys will be making too much urine
b. The urine formed will be more concentrated in solute, and lesser in volume
c. The kidneys will not filter the blood
d. The urine formed will be laden with blood
b. The urine formed will be more concentrated in solute, and lesser in volume
When is Calvin cycle performed?
a. During the day
b. During the night
c. Anytime of the day as long as the necessary materials are present
d. At 12 midnight
c. Anytime of the day as long as the necessary materials are present
Which of the following refers to a bacteriophage that can integrate its DNA in bacterial cell without
causing lysis?
a. Avirulent
b. Lysogenic
c. Lytic
d. Virulent
b. Lysogenic
Which of the following statements does not hold true regarding viruses?
a. They may be surrounded by envelopes, or capsid.
b. They are grown in artificial media provided with ATP.
c. Their genetic material can be DNA or RNA.
d. Their capsid is made of proteins of the same type.
b. They are grown in artificial media provided with ATP.
Alellopathy is the inhibition of plant growth due to the release of biochemicals by another plant.
Which of the following does alellopathy compares to the nearest?
a. Mutualism
b. Commensalism
c. Parasitism
d. Amensalism
d. Amensalism
Water vascular system serves as skeletal support of which animal group?
a. Mollusk
b. Echinoderm
c. Arthropod
d. Sponges
b. Echinoderm
