2022-2023 Biology 2nd Semester Final Review Set 3

Organisms with the most beneficial traits will survive and reproduce.  This is commonly known as

• DNA
• variations.
• survival of the fittest.
• ecosystems.

What are three pieces of evidence that inheritable genetic variations result from?

• new genetic combinations through meiosis, errors in DNA replication, and mutations from environmental factors

• errors in DNA replication, genetic combinations through mitosis, and mutations from chemical exposure

• mutations from bacteria, errors in DNA translation, and genetic combinations through phosphorylation

• errors in DNA transcription and new genetic combinations from DNA methylation

What characteristic does "survival of the fittest" need for survival of a species.

• Genetic Variation

• Speed

• Beak shape

• Biodiversity

Which is a group of organisms with similar characteristics and are able to interbreed to produce offspring

• Variation

• Species

• Fitness

• Gene

Environmental factors can influence natural selection because they can increase or decrease _____.

• the number of chromosomes in an individual.

• the number of chromosomes in a population.

• the amount of genetic variation in an individual.

• the amount of genetic variation in a population.

Genetic variations within a species are caused by ____.

• finite resources and natural selection

• overproduction and survival of the fittest

• random mutations and independent assortment of genes

• changes in the environment and adaptations

If an environment changes, populations with ______________ have a better chance of survival.

• No genetic variations
• Genetic variations
• A small number
• A large number

Individuals with intermediate traits are more likely to survive and reproduce

• stabilizing selection

• directional selection

• adaptive radiation

• disruptive selection

the selection pressure favors the extreme phenotypes, dividing the population into 2 distinct groups

• directional selection

• stabilizing selection

• geographic selection

• disruptive selection

individuals with alleles for an extreme type are more likely to survive and reproduce

• stabilizing selection

• directional selection

• disruptive selection

• genetic drift