Biology Final Exam 2023

Many people who raise chickens consider coyotes to be a pest. These people have decreased the coyote population in parts of the U.S. Which is a likely result of the decrease in the number of coyotes?

• The mouse population has increased.

• The hawk population has decreased.

• The goat population has decreased.

In the genetic pedigree, person U and her husband are considering having another child. What is the percent chance that this child will develop sickle cell disease?

• 25%

• 50%

• 75%

The sickle cell allele is most common in areas where the disease malaria is a significant problem. Evidence shows that the sickle cell allele makes a person resistant to malaria.

Although sickle cell disease has negative effects on those who suffer from it, the allele is widespread in may parts of the world. This is because in areas where malaria is a significant danger, the sickle cell allele...

• attacks the parasite that causes malaria

• spreads rapidly in people weakened by malaria

• conveys a health advantage to those who carry the allele

Which person on the pedigree could not pass the allele for sickle cell disease to their offspring?

• V

• X

• Y

For many years scientists debated whether viruses should be considered living organism. Which statement could a scientist use to support the position that viruses are not living?

• viruses have genes encoded in DNA

• viruses require a host cell in order to reproduce

• viruses infect both plant and animal cells

What gas does the process of photosynthesis release into the atmosphere?

• hydrogen

• nitrogen

• oxygen

Argentine ants and the ants native of the Cape region of South Africa both feed on a type of seed called "elaiosomes." The relationship between the Argentine ants and the native ants is described as...

• competitive

• parasitic

• commensal

In the Cape region of South Africa, native ants carry Proteaceae seeds back to their nests where they eat the elaiosomes (protein-rich "food patches" on the seed) and discard the seeds in underground chambers. The seeds will then successfully germinate. The relationship between the Proteaceae plants and the native ants is described as...

• commensal

• predatory

• mutualistic

Argentine ants were accidentally introduced to the Cape. The Argentine ants also feed on the elaiosomes of seeds that grow into M. cucullatus. However, they discard the seeds on the surface. This allows the seeds to be eaten or destroyed.

Introduction of the Argentine ant has affected the M. cucullatus by...

• increasing germination rates

• decreasing seed survival

• decreasing seed consumption

A scientist uses a microscope to examine two slides of living bacteria. The cells on the first slide are moving rapidly. The cells on the second slide are stationary.

Based on these observations, the cells on the second slide most likely have no...

• nucleus

• flagella

• chloroplasts