The evaluation of parents by comparing the performances of their offspring

Ecology was developed because of the need to understand, explain and solve the problem of humankind's increasingly damaging impact to _______________.

They play a major role in maintaining ecosystem structure and integrity.

The tendency of biological systems to resist change and remain in the state of equilibrium.

The biological clock enabling plants to adjust their metabolism to seasonal fluctuations is __________.

A protected fragile shield of gas that absorbs harmful ultraviolet from the sun that has been increasingly pierced by holes caused by man-made chemicals.

The type of species whose status provides information on the over-all condition of the ecosystem and of other species in that system.

This involves the evaporation of water from the stomata of the surface of the leaves thus creating a vacuum within plant tissues and ultimately enabling roots to take up soil nutrient solutions.

The living together of two or more organisms benefiting one, harming none is referred to as _______.

These are the tiny green bodies in the tissues that surrounds the vein in the leaf.

It is considered as a physical reaction in photosynthesis.

The hypocotyl is part of the embryo that develops into a:

______ is concerned with the way where different kinds of plants are distributed throughout the world.

It refers to the response of plants to relative lengths of light and dark period.

A component of the vascular tissue that functions primarily to conduct water and minerals.

These are the wildlife found only in the country or in a particular area of region in the country. They may have become resident of the area through the introduction of man.

All the animals found in a given area.

Auxin is a growth regulator that promotes _______ in plants.

The functional unit of heredity is known as:

It refers to the cumulative change in the characteristics of population of organisms over succeeding generations, resulting in species totally different from ancient ancestors.

This is a process by which animals arrive at a certain location where they live and grow.

A ripened ovule.

It refers to the body that administers an established protected area as prescribed in NIPAS Act.

Which refers to species diversity?

If the plants reproductive organs are in the same flower, the flower is ________; if the flower has only one pistil, it is _________.

This refers to a movement in response to light.

Precipitation usually occurs when air masses laden with water vapor are cooled to their dew point. Interception is part of precipitation collected by the plant canopy or other surfaces.

An organism which is the result of cross between two varieties, species or genera is called:

The enrichment of a water body with nutrients, resulting in excessive growth of phytoplankton, algae, or vascular plants leading to depletion of oxygen is called:

The induction of flowering by cold treatment.

__________ is the prevention of crossing among population due to chromosomal difference.

It is a plant which grows where it is not wanted.

A control measure for infestation using natural enemies is referred to as:

The relative humidity in forest is much higher than in an open area because of __________.

It is the prevention of crossing among population brought by difference in flowering time.

This refers to the science of studying the vegetative and reproductive part of trees and their development.

After pollination occurs, the growth of pollen tube follows leading to what is termed as:

It refers to the rapid and widespread occurrence of disease or insect attack of trees.

A term for propagules germination while still attached to the mother tree.

The transition zone between the root system and the stem is the:

Diameter growth occurs at the:

The symbiotic association between roots and fungi:

The collection of sepals that enclose the other flower organs in the buds.

The first stage of seed germination:

The transfer of pollen grains to the female reproductive structures involving ants as agents.

The collective term for stamens.

The tallest grass in the world.

Plants found in dry places are called:

It is a gaseous element needed by plants.