Category 1
During the cell cycle DNA is copied. Which step of Interphase does this occur in?
What is S-Phase
This process occurs in the nucleus and produces a molecule of mRNA
What is transcription
Which kingdom contains organisms that are mostly unicellular, eukaryotic, both autotroph and heterotrophs, contain euglena and amoebas?
What are protists?
In humans, glucose is kept in balance in the bloodstream by insulin. Which concept does this best illustrate?
What is homeostasis
Name the levels of organization in an environment from smallest (organism) to largest
What are organism, population, community, ecosystem, biosphere
Eukaryotic organisms have membrane-bound organelles. Which of these organelles is considered the "control center" and stores the genetic material for the cell?
What is the nucleus
Assume that transcription is occurring. What would be the sequence of nucleotides in the RNA that is made from the following DNA sequence? GCTATG
What is CGAUAC
Sharks and dolphin front fins, while similar in structure, are the result of necessary adaptations but they do not share common ancestry.
What type of evolution is this?
What is convergent evolution
What is the function of enzymes in biological systems?
What is to catalyze (speed up) the rate of chemical reactions
A symbiotic relationship where one organism benefits and the other is neither helped nor harmed.
What is commensalism
Placing wilted lettuce in cold water will make it crisp again. Which statement best describes what happens to restore the lettuce to its original condition?
A. Water left the lettuce cells by diffusion.
B. Water entered the cells of the lettuce by osmosis.
C. Osmosis caused salts to enter the lettuce cells.
D. Salts in the leaf caused water to leave the cells.
B. Water entered the cells of the lettuce by osmosis.
What is the possible genetic make-up of gametes produced by a DdTt organism (FOIL)?
What is DT, Dt, dT, dt
Evolution by Natural Selection is a theory well known in the scientific community. What is some evidence that supports this theory?
What is Fossil evidence, Homologous structures, molecular homologies (DNA) and common ancestors
A health supplement claims to build lean muscle and provide energy. Which two biomolecules must the supplement contain to provide these benefits?
what are proteins and carbohydrates
Which will most likely happen if the decomposers are removed from the carbon cycle?
A. The amount of carbon dioxide in the atmosphere will increase.
B. The amount of carbon dioxide in the atmosphere will decrease.
C. The amount of carbon dioxide used by producers will increase.
D. The amount of carbon dioxide needed by consumers will decrease.
B. The amount of carbon dioxide in the atmosphere will decrease.
Predict what may occur if a cell skips the G0 phase?
What is uncontrolled cell division with the possibility of cancer
(STAAR) In cocker spaniels the allele for black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, what will be the expected genotypic ratios?
0BB : 2Bb: 2bb
(STAAR)
Year Brown Beetle % Green Beetle %
1 78% 31%
2 83% 29%
3 77% 28%
The table above shows the survival rate of beetles in the same environment over a 3 year period. What conclusion can be drawn from this data?
A) green beetles are more fit to the environment
B) brown beetles are more fit to the environment
C) brown beetles have a shorter life cycle
B) brown beetles are more fit to the environment
(STAAR)
Chemicals enter the digestive system through contaminated foods. Once in the body, the chemical contaminants impair the body's ability to fight off disease.
Which two body systems are affected by the chemicals?
what is digestive and immune
In an ecosystem, if a primary consumer contains 150,000 Kcal of energy, how much energy will be found at the level of a tertiary consumer?
what is 1500 Kcal
Bacteria and protists are similar because they both contain single-celled organisms. Which characteristics help determine whether these cells are a Prokaryote or Eukaryote?
What is the presence of membrane bound organelles including a nucleus?
In tomato plants tall plants (T) are dominant over short plants (t) and harry stems (H) are dominant over hairless stems (h). What percentage of offspring from a TtHh x tthh cross would be expected to be heterozygous for both traits?
25% of offspring will be heterozygous for both traits
The Florida jaguar is a native species that is endangered. The population was down to 8 members. Scientists introduced a male jaguar from California into the population. Introduction of this jaguar is an example of-
A) Genetic drift that increases genetic variation
B) Genetic drift that decreases genetic variation
C) Gene flow that decreases genetic variation
D) Gene flow that increases genetic variation
D) Gene flow that increases genetic variation
(STAAR)
A person infected with the HIV virus may not have symptoms for a period of time. How does the virus affect the body?
A) the virus produces toxins that weaken immune cells to prevent them from reproducing
B) the virus damages immune cells while using their machinery and prevent them from reproducing
C) the virus uses nutrients meant for immune cells to fuel its own cell respiration
D) the virus changes the identity of nucleotides of immune cells to prevent the immune system and functioning normally.
B) the virus damages immune cells while using their machinery and prevent them from reproducing
(STAAR)
During ecological succession, how does the growth of young hardwoods affect the organisms living in an ecosystem?
A) Grasses and shrubs are unable to obtain the amount of light they need to survive, so there are small numbers of them
B) The trees provide shelter and food for a variety of mammals, insects and birds
C) In autumn, falling leaves provide a source of energy for decomposers such as fungi.
D) All of the above
D) All of the above