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WorksheetsQuizizz #24 (LE)
Total questions: 20
Worksheet time: 40mins
Identical twins were separated at birth and raised by two different families. Years later, one twin was a physically fit member of the cross-country team, and the other twin was overweight with slightly higher-than-normal blood pressure. The differences in these twins could be explained by the fact that
the genes in the two individuals are completely different
in twins, each individual inherits genes from only one parent
the DNA bases in twins combine differently
the environment can influence the expression of genes
In which cell structure is energy extracted from nutrients?
chloroplast
ribosome
mitochondria
vacuole
Two kittens in a litter are genetically different from each other and from their parents. These genetic differences are most directly due to
sexual reproduction
asexual reproduction
cloning
evolution
A genetic change that occurs in a body cell of a mouse will not contribute to the evolution of the species because
body cell mutations will cause the cell to die before it reproduces
the evolution of a species can result from changes in reproductive cells, not body cells
random changes are repaired by enzymes before they are passed on to offspring
the evolution of a species is caused by natural
selection, not genetic variation
A small lizard spends the morning hours lying
in the sunlight until its body temperature rises. Later on in the day, the lizard rests in a shady area until its body temperature cools. This type of behavior is important to
maintain homeostasis
detect variations
attract mates
obtain nutrients
Sexually reproducing organisms pass on genetic information as a
long chain of amino acid
complex series of inorganic proteins
sequence of complex sugars
sequence of the bases A, T, C, and G
Some viruses attack cells by attaching to their outer covering, entering, and taking over their genetic “machinery.” Viruses are able to invade cells after first attaching to their
nuclear membrane
cell membrane
genetic machinery
viral proteins
Maintaining a rich variety of genetic material that may lead to discoveries useful to humans can be ensured by
preserving biodiversity
increasing cloning
asexual reproduction
selective breeding
It may be harmful when people compete to see who can hold their breath the longest under water. Without oxygen, brain cells
cannot make enough ATP
have too few mitochondria
make too many enzymes
have too much water
A valid conclusion based on the information in the graph is that
the pH of some enzymes changes as the temperature changes
enzymes change color in proportion to the rate of activity
a difference in the pH of an environment changes enzyme activity
enzyme activity causes acids to change into bases over time
Which two processes are most directly represented in this diagram?
ATP synthesis and the diffusion of water
molecule transport and energy use
homeostasis and ATP synthesis
homeostasis and the diffusion of water
Which statement best explains this development?
Specialization occurs, resulting in the formation of a great variety of cell types.
Genes are inserted into the zygote to allow for the formation of different cell types.
The expression of genes responsible for the different cell types is controlled by the placenta.
The genetic information in the zygote is divided to produce a complete set for each cell type.
Although the digestive system is primarily responsible for the breakdown of food, this process can be disrupted if the circulatory system malfunctions. The best explanation for this disruption is that
human body systems interact with each other to perform life functions
he circulatory system is the control center of the body
the digestive system and the circulatory system have many organs in common
the circulatory system is responsible for the coordination of life functions, including the breakdown of food
When an organism reproduces asexually, it usually has
only one parent, and half as much DNA as the parent
only one parent, and the same chromosome number as the parent
two parents, and twice as much DNA as either parent
two parents, and the same chromosome number as each parent
The corn we eat today is larger and has more kernels than the corn people first grew thousands of years ago. Which process is most likely responsible for the changes that have occurred?
mitosis
succession
direct harvesting
selective breeding
Which statement is correct concerning hereditary information?
A chromosome is composed of many genes.
A gene is composed of many chromosomes.
Each chromosome carries the same information.
Each gene carries the same information
Which process is most closely associated with the regulation of water loss from the leaves of trees?
digestion of water within the cytoplasm in the leaf cells of the trees (
synthesis of protein by the chloroplasts in the leaf cells of the trees
movement of water through leaf openings controlled by the guard cells
absorption of nitrogen through leaf openings controlled by the guard cells
A mutation occurring in a human can be passed from parent to offspring when it occurs in a
lung cell, due to exposure to a toxic gas
gamete formed in the ovary
body cell undergoing mitosis
heart cell with chromosome damage
If the concentration of sodium is greater outside a cell than inside the cell, which process could move sodium out of the cell?
diffusion
carbohydrate synthesis
active transport
digestion
The basic building blocks of a protein are
glucose molecules
amino acids
hormones
fats
