The organism that has a hydrostatic skeleton is

The possession of scales, laying of eggs with shells and bony structure of the head are characteristics shared by

The group of Arthropods that has no antennae is the

The structure that is most commonly identified in all living cells under the light microscope is the

Which of the following is an organ?

The structure labelled II is used for

The division of a body into two equal halves along a longitudinal plane is called

In which of the following organisms does each cell combine the function of nutrition, reproduction and growth?

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

In plant cells, the chloroplast are located

In the woody stems, gaseous exchange takes place through the

Substance manufactured by the leaves are transported to other parts of the plant through the

After a meal of yam has been digested, the highest concentration of glucose is to be found in the

The dark reaction of photosynthesis involves

Mammals acclimatize to reduced oxygen content at high altitudes by

The modes of nutrition in Nitrobacter, Ascaris and Homo sapiens respectively are

The richest source of vitamin A are

The force that holds water together in the form of a stream within the xylem tube is the

Yellowing of leaves is a symptom associated with deficiency of

The lymphatic system of mammals rejoins the blood circulatory system at the

In dissection, the rib cage of mammal has to be opened in order to expose the

Fertilization in humans usually takes place in the

Insects visit flowers in order to

In epigeal germination, the cotyledons are

Bacteria multiply rapidly by means of

The correct sequence for the perception of smell in mammals is

The part labelled III is for

The structure labelled II is known as

In mammals, the organ which performs digestive and endocrine functions is the

Th chitin in the exoskeleton of many arthropods is strengthened by

The construction of dams may lead to an increase in the prevalence of

Floating microscopic heterotrophs are mostly grouped as

Vaccination is carried out in order to

A soil consisting of alumina and iron (II)oxide is known as

The sign + is used to indicate an association where an organism gains, while 0 is used where an organism is unaffected. An association indicated as +0 is known as

Which of the following characterizes the white mangrove?

If the offspring of a cross between a brown mouse (bb) and a black mouse (BB) are allowed to interbreed, how many different genotypes would result?

The biological factor that is unique to each individual is the

From evolutionary standpoint , the older a fossil-bearing rocks is, the more likely it is to contain

The very bright colours in some types of mushroom

The least adaptive feature of aboreal life is the

Which of the following is one of Lamarck's theories?