Science Periodical Examination

What system is responsible for the exchange of oxygen and carbon dioxide between the air and the cells?

• circulatory

• digestive

• excretory

• respiratory

Which part of the respiratory system filters and warms the air entering the body?

• air sac

• bronchi

• diaphragm

• nasal cavity

What is the main organ of the circulatory system?

• arteries

• blood

• heart

• veins

Which of the following activities supports lung health?

• smoking regularly

• drink alcohol excessively

• stress all the time

• regular exercise and a balanced diet

Which non-Mendelian pattern of inheritance takes place when one allele is NOT dominant over another, resulting in a blended phenotype for heterozygous offspring is considered?

• codominance

• dominance

• dominant

• incomplete dominance

Which of the following is an example of a sex-limited trait?

• baldness

• colorblindness

• hemophilia

• polydactyly

A sex-influenced trait is one where the expression of a trait is influenced by the sex of an individual. Which of the following is an example of a sex-influenced trait?

• ABO blood group

• Hemophilia

• Female pattern baldness

• Red-green colorblindness

What type of inheritance is observed in the ABO blood group system?

• Codominance

• Multiple alleles

• Incomplete dominance

• Sex-linked inheritance

What does the term "biodiversity" refer to?

• variety of plants

• a variety of all life on earth

• variety of places

• a variety of non-living things

What refers to the number of organisms per size in an area?

• Biodiversity

• Community

• Extinction

• Population density