Biology EOC Review Practice Questions w/ answers and video

Front

What are consumers in an ecosystem?

Back

Consumers are organisms that obtain their energy by feeding on other organisms, including plants and animals.

Front

What is the significance of polar bears and brown bears having different evolutionary adaptations?

Back

Polar bears evolved to thrive in colder climates, while brown bears adapted to slightly warmer environments, leading to their divergence.

Front

What does Mendel's law of dominance state?

Back

Mendel's law of dominance states that in a heterozygous genotype, the dominant allele will mask the effect of the recessive allele.

Front

What is the expected outcome of a cross between two homozygous parents (AA x aa) in terms of the F1 generation?

Back

The F1 generation will all show the dominant trait and will be heterozygous (Aa), increasing chances of future variation.

Front

Why do humans and chimpanzees share a high percentage of DNA?

Back

Humans and chimpanzees share a high percentage of DNA because they evolved from a common ancestor.

Front

What is a heterotroph?

Back

A heterotroph is an organism that cannot produce its own food and instead obtains its nutrients by consuming other organisms.

Front

Define producers in an ecosystem.

Back

Producers are organisms, such as plants and algae, that can make their own food through photosynthesis.

Front

What is the role of natural selection in evolution?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

Explain the concept of genetic variation.

Back

Genetic variation refers to the differences in DNA sequences among individuals, which can lead to different traits and adaptations.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype is the observable physical or biochemical characteristics.