WorksheetsREGENTS PRACTICE 2018
Total questions: 31
Worksheet time: 16mins
An example of recycling is
using a paper cup instead of a mug
turning off the lights when leaving a room
using plastic from a soda bottle to make a certain type of clothing
using two paper towels rather than fi ve to clean up a spill
One characteristic of a stable ecosystem is
a high number of predators
an interdependence of organisms
a lack of biodiversity
an increase in human interference
Natural selection produces changes most quickly in
species with short reproductive cycles
individual pathogens killed by antibiotics
complex multicellular organisms
individuals that produce a small number of offspring
Which statement best describes what is most likely to occur if an animal population grows larger than the carrying capacity of its environment?
The birth rate will increase.
Both the birth rate and death rate will decrease.
The death rate will increase.
Neither the birth rate nor the death rate will decrease.
Many biotic factors affect individuals in a population. An example of an organism being directly affected by a biotic factor is
a squirrel cannot find a mate
a flood washes away a maple tree
a plant is in a dark room
a chipmunk finds a rock pile to use for a home
Farmers may someday clone their best milk producing cow into a whole herd. What potential disadvantage might be important to consider in having such a large group of clones on one farm?
It may be difficult to tell the animals apart.
Lack of variation may limit survival in the herd.
The cows could be fertilized by only one type of bull.
The cows could be mated only with each other.
DNA replication occurs in preparation for
mitosis, only
meiosis, only
both mitosis and meiosis
neither mitosis nor meiosis
An individual eats a hamburger. Which two systems must interact to transfer the nutrients in the hamburger to human muscle tissue?
respiratory and excretory
digestive and immune
digestive and circulatory
circulatory and respiratory
The diagram represents a cell and some molecules in its environment. Which molecule would require the use of energy in order to be brought into the cell?
1
2
3
4
A strand of DNA in a skin cell contains the bases:
A-T-G-C-C-A-T-C-G-G-T-A
After the cell is exposed to ultraviolet light, the strand contains the bases:
A-T-G-G-C-C-A-T-C-G-G-T-A
Which statement describes the result of this exposure?
A new base has been inserted.
A base has been deleted.
One base has been substituted for another.
There have been no changes in the bases.
After a zygote is formed, specialization of cells occurs. Through which process do the cells of a zygote become specialized?
sexual reproduction
meiosis
fertilization
differentiation
In humans, the placenta is essential to the embryo for
nutrition, excretion, and reproduction
respiration, nutrition, and excretion
movement, reproduction, and nutrition
coordination, movement, and growth
Which occurrence represents an example of evolution?
Exposure to radiation reduces the rate of mutation in leaf cells.
A mutation in a liver cell causes a person to produce an enzyme that is less efficient.
Cells in a zygote eventually change into bone cells or skin cells.
Some antibiotics are almost useless, because pathogens have developed a resistance to these antibiotics
Structures in an animal cell are represented in the diagram. Which row in the chart correctly identifies the functions of structures A, B, and C?
A-waste removal, B-extract energy from nutrients, C-protein synthesis
A-information storage, B-transport of materials, C-storage of liquids
A-protein synthesis, B-storage of wastes, C-reproduction
A-cell communication, B-transport of materials, C-waste removal
A man is exposed to large amounts of ultraviolet radiation while sunbathing at the beach. This exposure causes a genetic change in the DNA of a skin cell. In the future, this change can be passed on to
his male and female children
his male children, only
all cells in his body
his skin cells, only
The human female reproductive system is represented. Which structure produces chemicals that regulate the reproductive cycle?
A
B
C
D
The diagram represents a cell structure involved in converting energy stored in organic molecules into a form used by animal cells. The arrows represent the movement of which substances?
carbon dioxide and sugar
oxygen and ATP
ATP and carbon dioxide
oxygen and sugar
The diagrams represent two molecules that are involved in metabolic activities in some living cells. The shape of each of the molecules is important because
molecules having different shapes are always found in different organisms
the shape of a molecule determines how it functions in chemical reactions
the shape of a molecule determines the age of an organism
if the shape of any molecule in an organism changes, the DNA in that organism will also change
The diagram shows some of the DNA in a bacterium into which a human gene, X, has been successfully inserted. The bacteria that result from reproduction of this cell will most likely have the ability to
replicate all of the genetic instructions found in humans
produce vaccines to be used to immunize humans
produce a human blood cell according to instructions in gene X
produce the human protein coded for by gene X
Genetic engineering has the potential to correct human genetic disorders. In gene therapy, a defective gene is replaced by using a virus to insert a normal gene into the cells of an individual. This treatment will be most successful if the virus is inserted into cells that
lack a nucleus
are recycled after death, rather than removed from the body
carry out one specific function, rather than multiple functions
continue to divide during the life of the patient
PART B1 - The graph shows the size of a population of foxes over a period of years. If the line did not stay around the carrying capacity, but continued to rise, which concept would this graph best illustrate?
environmental stability
genetic variety
behavioral change
overproduction
PART B1- The graph represents the effect of pH on three different enzymes at normal body temperature. The graph illustrates that enzymes 1, 2, and 3
are not affected by pH
work best at different pH levels
work best in an acidic environment
work best in a basic environment
PART B1- The diagram represents a portion of a starch molecule. The building blocks for this molecule are
amino acids
simple sugars
fats
molecular bases
PART B1 - The energy in this molecule is stored
in the bonds between atoms
in the oxygen found in the molecule
when the carbon atoms break off
when water breaks this molecule apart
PART B1 - The diagram indicates a few of the many varieties of domestic dogs thought to have originated from wolves that were domesticated thousands of years ago.
(Not drawn to scale) Wolf Bulldog Collie Dachshund Adapted from: http://evolution.berkeley.edu/evolibrary/article
The many varieties of domesticated dogs were most likely produced as a result of
mutating the body cells of the dogs
selective breeding over many generations
genetic engineering with specific enzymes
cloning dogs with desirable traits
PART D - The buildup of waste products in muscle cells that are active might cause
digestion
cellular respiration
increased fatigue
decreased heart rate
PART D - A group of students obtained the following data while trying to determine the effect of exercise on pulse rate. Which statement is an example of an observation the students could have made?
Pulse rates in beats per minute decrease for all people after exercise.
Student A most likely exercises regularly.
The pulse rate of student C was dangerously low.
The pulse rate of student F increased by 30 beats per minute.
PART D - On various Galapagos islands, finch species have different diets: seeds, insects, flowers, the blood of seabirds, and leaves. This is evidence that each species has a different
mating behavior
nesting material
niche
predator
PART D - The diagram represents an experimental setup. Which statement best describes what would most likely be observed after 20 minutes?
The contents in the dialysis tube would turn blue-black.
The liquid in the beaker would turn blue-black.
The dialysis tube would burst.
There would be no change visible.
PART D - Which term correctly identifies the process by which molecules move through the dialysis tube membrane?
paper chromatography
active transport
diffusion
digestion
PART D - Scientists attempted to determine the evolutionary relationships between three different finch species,
A, B, and C.
In order to do this, they examined the physical characteristics and DNA of these species. DNA was extracted from all three species and analyzed using gel electrophoresis. The results are shown in the diagram.
Which statement best describes the method used above to determine the evolutionary relationships between three species of finches?
Examine the structure of the beaks and compare them.
Observe behavioral and physical characteristics of all the finches and group them by similarities.
Obtain molecular evidence from all three species and identify similarities.
Compare common ancestors of all three of the species to see if they are the same.
