DELSU Biology 2016/2017 Past Questions

Practice each question, then open it to see the full details.

The membrane surrounding the vacuole in a plant cell is called the

A.plasma lemma
B.tonoplast
C.Nuclear membrane
D.Endoplasmic reticulum

Which one of the following animals is Never a secondary host of tapeworms?

A.cow
B.fish
C.pig
D.man

A pyramid of number can be defined as

A.the number of plants and animals in ecosystem
B.an arrangement of organisms according to their habitat
C.the numerical relationships of a food chain
D.the number of plants and animals in a population.

In which of these association is much harm dine to one of the partners

A.symbiosis
B.epiplıytism
C.commensalism
D.parasitism

Colonization of a bare rock surface is termed

A.evolution
B.speciation
C.primary succession
D.secondary succession

Which of the following organisms has most the Pentadacty/limb structure?

A.bat
B.fish
C.froy
D.pigeon

The plumule is best described as

A.part of the Cotyledon
B.Part of endosperm
C.a miniature shoot
D.structure near the micropyle

The specific number of chromosomes in cach sematic cell is represented by

A.2^N
B.23
C.2N
D.N

Women do not sufler from colour blindness because

A.the trait is sex-linked
B.only men are coloured blind
C.the genes are recessive and self-linked
D.the genes occur on both the x and y chromosomes