WorksheetsBASELINE DE BIO
Total questions: 50
Worksheet time: 40mins
Which of the following converts food into energy for the cell?
vacuole
mitochondria
cytoplasm
cell membrane
Plant cells are able to produce their own food. This process happens in which structure?
cell wall
chloroplast
mitochondrion
vacuole
These diagrams show a variety of cells from the same organism.
How can cells from the same organism have such different shapes and functions?As each cell differentiates, the DNA changes so that each type of cell has different DNA once it reaches maturity.
As each cell differentiates, the DNA changes so that each type of cell has different
Mutations in the cells’ nuclei lead to new combinations of DNA, resulting in different shapes and functions in the different types of cells.
During differentiation, different parts of the DNA in each type of cell are activated, resulting in the different structure and function of the cells.
During differentiation, different types of cells produce proteins which destroy the nonactive DNA, leading to cell specialization.
Which statement best explains how sweating during exercise maintains homeostasis?
It regulates mineral concentrations in cells
It regulates body temperature
It maintains water balance
It maintains sugar balance in cells
Which statement best explains why animals are considered heterotrophic?
They are able to produce food through the process of photosynthesis.
They are able to produce food through the process of respiration.
They are able to obtain nutrients by decomposing plant and animal tissue.
They are able to obtain nutrients by consuming other organisms or their products
In some ecosystems, wolves have been eliminated due to their threats to humans. How can the reintroduction of wolves benefit the ecosystem?
It can eliminate weak animals from a prey population, thereby decreasing competition for natural resources
It can eliminate the most fit animals among the prey population, which will cause an increase in birth rates of the prey
It can cause the prey population to migrate to other areas, resulting in more fit prey.
It can cause the prey population to better blend in with their environment.
What will most likely be the result as humans move into new areas, forests are clear cut and housing developments are built?
Global temperatures will decrease because trees are removed.
Many organisms will lose their homes because their habitats have been destroyed.
Better sanitation in the area will reduce the amount of pollution.
The rainfall in the area will increase because there will be increased runoff.
Which effect could a mutation in mRNA have on the production of proteins?
The protein produced will have a different identity
The protein produced will have a coiled shape.
The protein produced will produce excess nitrogen.
The protein produced will produce excess water
What carries the instructions for making amino acids in a protein?
the nitrogen base on the tRNA
the hydrogen bonding between nitrogen bases
the sequence of nitrogen bases on the mRNA
the nitrogen base bonding on the DNA molecule
In the graph to the right, what is the population of deer at the carrying capacity of the environment?
3
7
70
40
Is the following cell diploid or haploid?
Diploid
Haploid
AATCATGGA
ATG GGA ACT CCA
During translation, what does the tRNA deliver to the ribosomes?
amino acids
DNA
mRNA
proteins
Having freckles is dominant over not having freckles. If two individuals heterozygous for freckles have a child, what is the probability the child will have freckles?
0%
25%
50%
75%
Which statement best describes natural selection?
As the weather changes, organisms that are able to find shelter need less energy to live.
Organisms that eat only plants need less food than organisms that eat animals.
Organisms better adapted to their environment are more likely to reproduce and pass on their traits to their offspring.
Small organisms are more likely to survive than larger organisms.
Which molecules are joined together to make proteins?
fatty acids
nucleic acids
amino acids
acetic acids
Which word equation best represents the process of cellular respiration?
carbon dioxide + glucose → oxygen + water
carbon dioxide + water → glucose + oxygen
glucose + oxygen → carbon dioxide + water
oxygen + water → carbon dioxide + glucose
How are meiosis and fertilization a benefit to sexually reproducing organisms?
All offspring will have the most desirable traits from each parent.
All offspring will have traits that are identical to their siblings but different from their parents.
All offspring will have unique genetic variations and sets of alleles.
All offspring will have the same probability of acquiring mutations in their genes.
Which statement describes the offspring produced from asexual reproduction?
All of the offspring are identical to each other.
All of the offspring are unique to each other.
Half of the offspring have genetic material similar to the original cell.
Half of the offspring have physical characteristics similar to the original cell.
How does natural selection improve a population?
The individual organisms that are best suited to the future environment survive, and their gene types increase in the population.
The individual organisms that are best adapted to the current environment survive, and their gene types increase in the population.
The individual organisms that are best suited to the previous environments are removed and cause the population size to decrease.
The individual organisms that are best suited to another environment are removed and the population size to decrease.
