Question 1

Which of the following best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus enclosed by a membrane, while prokaryotic cells lack a true nucleus.

Question 2

Which property is generally associated with living organisms?

Accepted Answer

Ability to reproduce and respond to stimuli

Question 3

Which of the following is NOT a basic component of all cells?

Accepted Answer

Nucleus

Question 4

A student observes that a certain organism reproduces by budding, producing genetically identical offspring. Which type of reproduction is this?

Accepted Answer

Asexual reproduction

Question 5

Which of the following is a disadvantage of asexual reproduction compared to sexual reproduction?

Accepted Answer

It produces offspring that are genetically identical to the parent.

Question 6

During which phase of mitosis do the chromosomes align at the center of the cell?

Accepted Answer

Metaphase

Question 7

Which process results in the formation of gametes with half the chromosome number of the parent cell?

Accepted Answer

Meiosis

Question 8

Which of the following best explains how crossing-over during meiosis increases genetic variation?

Accepted Answer

It exchanges genetic material between homologous chromosomes.

Question 9

A diploid cell contains 16 chromosomes. After meiosis, how many chromosomes will each resulting gamete have?

Accepted Answer

$8$

Question 10

Which statement best describes the principle of segregation?

Accepted Answer

Each gamete receives only one allele of each gene.

Question 11

In a monohybrid cross between two heterozygous individuals ($Aa 	imes Aa$), what is the expected genotypic ratio of the offspring?

Accepted Answer

$1:2:1$ (AA:Aa:aa)

Question 12

Which of the following is true about incomplete dominance?

Accepted Answer

The heterozygote expresses a phenotype that is intermediate between the two homozygotes.

Question 13

Which of the following best defines evolution?

Accepted Answer

The change in allele frequencies in a population over time.

Question 14

Which factor did NOT influence Darwin's ideas about evolution?

Accepted Answer

The discovery of DNA structure

Question 15

What is required for natural selection to occur in a population?

Accepted Answer

Variation in traits, differential survival or reproduction, and heritability of traits.

Question 16

Which of the following is an example of adaptation produced by natural selection?

Accepted Answer

A population of moths developing darker coloration in polluted environments.

Question 17

Which line of evidence supports the basic premise of evolution?

Accepted Answer

Fossil records showing transitional forms

Question 18

Which statement best describes the difference between natural selection and evolution?

Accepted Answer

Natural selection is the process that drives evolution by favoring advantageous traits.

Question 19

If a plant with genotype $Tt$ (where $T$ is tall and $t$ is short) is crossed with another $Tt$ plant, what is the probability that an offspring will be short?

Accepted Answer

$\frac{1}{4}$

Question 20

Which of the following best explains why random assortment of homologous chromosomes during meiosis is important?

Accepted Answer

It increases genetic variation among offspring.

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