Cell Biology
The function of the nucleus is
A) To makes proteins
B) Storage
C) Store DNA and manage cell processes
D) Regulate what comes in and out of the cell
C: Store DNA and manage cell processes
Sexual reproduction produces _________ offspring while asexual reproduction ____________ produces offspring
different, identical
The rock pocket mouse evolving to have dark fur to match a landscape that is turning darker due to volcanic activity is an example of
1) Sexual Selection
2) An adaptation
3) Decreasing Fitness
4) A negative mutation
2) An adaptation
The temperature increase seen after the industrial revolution...
1) Is a little higher then what would be considered normal
2) Is way higher then what would be considered normal
3) Is about what we would expect
4) Is much slower then would be expected
2: Is way higher then what would be considered normal
Which of the following is NOT a characteristic of all living things?
1) Reproduce
2) Maintain homeostasis
3) Forage for food
4) Being made of cells
3: Forage for food
An organism develops in which of the four orders?
A) Meiosis, Fertilization, Mitosis, Differentiation
B) Fertilization, Meiosis, Differentiation, Mitosis
C) Fertilization, Mitosis, Differentiation, Meiosis
A: Meiosis, Fertilization, Mitosis, Differentiation
What are the two key differences between DNA and RNA
1) DNA is double stranded while RNA is single stranded.
2) T in DNA is swapped for U in RNA
What drives some species of birds to have large tail feathers with no clear function?
(1) Sexual Selection
(2) Natural Selection
(3) Camouflage
(4) Mitosis
(1) Sexual Selection
The difference between greenhouse gases and pollutants is
1) Pollutants operate on a global scale while greenhouse gases are local
2) Greenhouse gases operate on a global scale while pollutants are local
3) Greenhouse gases lead to respiratory disease
4) Pollutants lead to the greenhouse effect
2) Greenhouse gases operate on a global scale while pollutants are local
Which of the following is an example of an autotroph?
1) A lion
2) A human
3) An amoeba
4)A moss
4: A moss
Cells possess structures that perform specific jobs. Which statement correctly pairs a cell structure with a function it performs in the cells?
(A) The cell membrane synthesizes proteins for cell processes.
(B) The mitochondria provide energy for cell processes.
(C) Ribosomes regulate which materials enter and leave the cell.
(D) Vacuoles transfer genetic information from one cell to another.
B: The mitochondria provides energy for cell processes
A sample of DNA from a human skin cell contains 32% cytosine (C) bases. Approximately what percentage of the bases in this sample will be thymine (T)?
(1) 18
(3) 32
(2) 24
(4) 36
(1) 18
The endangered Everglade snail kite is a predatory bird which usually feeds on small snails. Conservationists feared the snail kite would face a greater decline when the Everglades was invaded by a species of larger snail that the birds had historically struggled to eat. But the snail kite population increased over several years, and the snail kites now have larger beaks and bodies.
This change in the snail kite can best be explained by
(1) selective breeding with larger kites
(2) natural selection after an environmental change
(3) genetic engineering to modify specific genes
(4) ecological succession due to random mutation
(2) natural selection after an environmental change
Homeowners have been encouraged to learn how to identify invasive plants and to remove them if they fi nd them. The most likely reason for removing invasive plants is to
(1) allow only one type of native plant to grow (2) preserve biodiversity
(3) eliminate unfamiliar food sources
(4) increase the rate of ecological succession
2: Preserve biodiversity
Which process occurs at each link in a food chain?
(1) All the energy is stored in a newly made structure.
(2) Some energy is released into the environment as heat.
(3) Chemical energy is recycled.
(4) Atoms cycle among living organisms, producing energy.
2: Some energy is released into the environment as heat.
A multicellular organism has cells that perform various roles in that organism. This is most likely due to the
(A) differentiation of cells during embryonic development
(B) specialization of gametes
(C) cloning of cells during embryonic development
(D) specialization of zygotes
A: Differentiation of cells during embryonic development
The development of organs and tissues from a zygote includes
(1) mitosis and differentiation
(2) mitosis and gamete production
(3) meiosis and gamete production
(4) meiosis and fertilization
An example of competition between members of two different species is
(A) mold growing on a dead tree that has fallen in the forest
(B) purple loosestrife plants growing in the same wet areas as cattail plants
(C) a coyote feeding on the remains of a deer that died of starvation
(D) two male turkeys displaying mating behaviors to attract a female turkey
B: purple loosestrife plants growing in the same wet areas as cattail plants
Two new wind turbines have recently been built within the Eiffel Tower in Paris. The power that these turbines generate will be enough to power the entire fi rst fl oor of the tower, including the restaurants, shops, and exhibits. A benefi t of using wind power as an alternative source of energy is that it
(1) is nonrenewable, so additional resources will be depleted by tower businesses
(2) is renewable, so it will decrease the environmental impact of the tower businesses (3) increases the use of resources that cannot be renewed in the future
(4) decreases the amount of fossil fuels available for future generations
2: is renewable, so it will decrease the environmental impact of the tower businesses
If body temperature is too high, some blood vessels increase in size and sweat glands will excrete sweat, resulting in a lower body temperature. These changes are an example of (1) a learned behavior
(2) feedback mechanisms
(3) an inherited disorder
(4) genetic mutations
2: Feedback mechanisms
Consider two scenarios
Scenario 1: When there is high water availability the guard cells of a leaf open the pores
Scenario 2: When little water is available the guard cells close the leaf pores
The changes in the guard cells’ activity illustrate...
(A) an immune response intended to limit water use
(B) passive transport in response to the Sun shining
(C) a feedback mechanism to control water loss
(D) genetic manipulation caused by the presence or absence of water
C: A feedback mechanism to control water loss
A lion cub resembles its parents because it inherits genes that produce
(A) DNA identical to all of the DNA found in both parents
(B) proteins identical to all of the proteins found in both parents
(C) ATP identical to some of the ATP found in each parent
(D) enzymes identical to some of the enzymes found in each parent
D: enzymes identical to some of the enzymes found in each parent
CRISPR/Cas9 is a powerful system that bacteria use to cut and remove DNA from invading viruses. Using CRISPR/Cas9, researchers have successfully corrected a disease-causing mutation for muscular dystrophy in laboratory mice. Correcting the harmful mutation using CRISPR/Cas9 is an example of
(1) biological evolution
(2) cloning techniques
(3) genetic engineering
(4) selective breeding
(3) genetic engineering
Some states require shoppers to pay a deposit on certain beverage containers made of plastic and glass. When shoppers return the containers, their deposits are returned to them. How is this system intended to help the environment?
(1) It encourages people to buy products that do not have a deposit.
(2) It reduces the amount of money shoppers actually spend.
(3) It reduces the amount of plastics and glass put into landfills.
(4) It forces manufacturers to reduce air pollution when they are making the containers.
3: It reduces the amount of plastics and glass put into landfills
The ameba, a single-celled organism, reproduces asexually. Variations in an ameba would most commonly occur through
(A) differentiation during development
(B) the fusion of gametes
(C) random mutations
(D) recombination during fertilization
C: Random mutations