Biology

How does an enzyme affect the rate of a reaction?

A. It lowers the activation energy of the reaction, increasing the reaction rate. B. It raises the activation energy of…

5 years ago

In mosses, the structure which performs the function of water absorption is the?

A. root hairs B. rhizoids C. capsule D. hyphae Correct Answer: Option B - rhizoids Explanation Mosses do not have…

5 years ago

Which of the following factors can reduce the population of a community?

A. Immigration B. edaphic C. predation D. mutualism Correct Answer: Option C - predation Explanation Predation includes all interactions in…

5 years ago

The host of liver flake are?

A. pig and snail B. pig and sheep C. sheep and snail D. pig Correct Answer: Option B - pig…

5 years ago

Carbon (iv) oxide is added to the atmosphere when?

A. plants build-up organic compounds B. plants absorb mineral salts C. sugars are completely broken down in animals D. there…

5 years ago

The most efficient respiratory structure used by free living protozoan is?

A. body surface B. gills C. buccal cavity D. spiracle Correct Answer: Option A - body surface Explanation Protozoa do…

5 years ago

Gregor Mendel is regarded as the father of?

A. variation B. genetics C. mycology D. natural selection Correct Answer: Option B - genetics Explanation Gregor Mendel, through his…

5 years ago

Erythrocytes are known as?

A. white blood cell B. red blood cells C. phagocytes D. leucocytes Correct Answer: Option B - red blood cells…

5 years ago

The key event in the transition of the amphibians from water to land is the?

A. replacement of the gills with lungs B. possession of webbed limbs C. limbs D. possession of tympanic membrane Correct…

5 years ago

Which of the following is an example of active transport?

A. Oxygen exchanging between red blood cells and liver cells B. Carbon dioxide exchanging between muscle cells and red blood…

5 years ago