SUMMATIVE TEST 4TH

Food enters the digestive tract through --------- where mechanical digestion mainly occurs, through mastication.

The food passes down the . ------- and into the cardiac end of the stomach. The stomach releases gastric juice which is composed of hydrochloric acid and pepsin.

Digested food is churned in the pyloric end of the stomach and then entered the .------------ where digestion and absorption mostly occurs.

Undigested food proceeds to the ------ where the dehydration of which occurs.Substances that cannot be absorbed exit the body through anus.

What do you call the branch of science that deals with the study of heredity and variation?

• Genetics

• Biology

• Heredity

• Variation

A pure round seeded plant (RR) is crossed to a wrinkled seeded　plant (rr). Out of the four offspring, how many will be round seeded plant?

• 1

• 2

• 3

• 4

What will be the genotypes of the offsprings?

• 4RR

• 4rr

• 4Rr

• 2Rr

Which of the following Mendelian principle explains that the dominant trait dominates or prevents the expression of the recessive trait?

• Law of dominance

• law of Segregation

• law of independent assortment

• law of codominance

What do you call the movement of the substance in the colon?

• Peristalsis

• amoeboid movement

• mass movement

• sliding movement

Which of the following is the function of the gall bladder?

• It produces insulin and glucagon

• it produces bile

• It stores bile

• It stores pancreatic juice