Science 8 First Quarter Exam

The following statements explain the process of ingestion, EXCEPT. Ingestion ___________.

• is the act of taking in food.

• includes mastication or chewing.

• takes place in the small intestine.

• is the first step to obtaining nutrition.

Which of the following statements best explains how absorption happens in the small intestine?

• It mixes with other food with digestive secretions and enzymes.

• It receives secretions from the pancreas and the liver to aid in digestion.

• It aids in the chemical digestion of proteins, carbohydrates, and fats into simpler forms.

• The inner wall of the intestine is covered with tiny fingerlike structures called villi which increase the surface area for food absorption into the bloodstream.

What happens during the assimilation process?

• Breaking down food into tiny pieces.

• Absorption of nutrients from the digested food.

• Absorbed nutrients are delivered into the cell.

• Elimination of waste products in the digestion process.

How does the liver help in the assimilation process? The liver ___________.

• secretes bile.

• converts glucose to glycogen.

• removes excess amino acids.

• converts protein to an amino acid.

What does the large intestine do? It ___________.

• absorbs simple sugars.

• is responsible for the elimination of waste products.

• is responsible for breaking down protein into amino acids.

• aids in the absorption of water and mineral salts from the undigested food material.

Mitosis and meiosis are processes involved in cellular reproduction. Select all the statements that describe their similarities.

• I, II, and VI

• I, III, and IV

• I, V, and VI

• I, III, and IV

If mitosis occurs in body cells, where does meiosis occur?

• Blood cells

• Sex cells

• Somatic cells

• Body cells and Sex cells

Which of the following statements describes the main difference between the outcome of mitosis and meiosis? Mitosis results in ___________.

• two diploid cells with different genetic information while meiosis results in four haploid cells with identical genetic information.

• two diploid cells with identical genetic information while meiosis results in four haploid cells with different genetic information.

• four haploid cells with different genetic information while meiosis results in four haploid cells with identical genetic information.

• four haploid cells with identical genetic information while meiosis results in four haploid cells with different genetic information.

If a diploid cell with 32 chromosomes undergoes cell division, how many chromosomes will there be in each daughter cell at the end of mitosis and meiosis?

• Mitosis-16, Meiosis-8

• Mitosis-16, Meiosis-16

• Mitosis-32, Meiosis-16

• Mitosis-32, Meiosis-3

At what phase of cellular division does crossing-over occur? During _________.

• anaphase of mitosis.

• prophase I of meiosis.

• prophase II of meiosis.

• the prophase of mitosis and meiosis.