The following can increase crop production EXCEPT

A. erosion control

B. fertilizer application

C. mechanization

D. monocropping

E. pest control

Which of the following enzymes requires acidic medium to function?

A. Amylase

B. Erepsin

C. Maltose

D. Pepsin

E. Ptyalin

Which of the following is NOT a type of exoskeleton?

A. Cartilage

B. Chitin

C. Hoot

D. Nail

E. Shell

The number of chromosomes in a gamete is represented by

A. n

B. 2n

C. 4n

D. 23n

E. 46n

An example of a carnivorous plant is

A. cassytha

B. lichen

C. mucor

D. mushroom

E. sundew

Autotrophs include all the following EXCEPT

A. chemosynthetic bacteria

B. diatoms

C. green plants

D. phytoplankton

E. zooplankton

Which of these statements best defines pyramid of energy?

A. energy flow from one tropic level to another

B. energy flow from one habitat to another

C. the amount of energy in a given area

D. the loss of energy from one organism to another

E. the rate of energy flow in an area

Dry, horny scales in reptiles help them to

A. carryout gaseous exchange

B. escape from predator

C. facilitate movement

D. look for mating partners

E. prevent water loss.

The process which reduces the nitrogen content of the soil is

A. ammonification

B. denitrification

C. nitrogen fixation

D. nitrification

E. putrefaction