Question Library

The porcupine fish has spines on its body. The fish sucks in water and swells up to make the spines stick out. This transforms it from a small mouthful into an uneatable ball of prickly spines. Its flesh also contains a deadly poison as an extra defense.

taxis (tactic movement) A change in direction of locomotion in a motile micro-organism or cell, made in response to certain types of external stimulus

Mitosis is understood to involve five phases, based on the physical state of the chromosomes and spindle. These phases are prophase, prometaphase, metaphase, anaphase, and telophase. Metaphase is the third phase of mitosis, which is a process that separates the duplicated genetic material carried in the nucleus of a parent cell into two, identical daughter cells

Most terrestrial insects produce uric acid as their main nitrogenous waste product. Uric acid is a relatively non- toxic and highly insoluble waste product. Therefore, it can crystallize out of solution, and may be either retained in the body, or eliminated as a solid waste material with little water loss.

Succession can be defined as a progressive natural development of vegetation towards a climax during which one community is gradually replaced by others. The abandoned farmland is a secondary succession as a result of the fact that it follows a partial destruction of the original vegetation.

Southern Guinea Savanna occurs in parts of Oyo, Ondo, Osun and Kwara states.

Dark stage, also known as biosynthetic or assimilatory, is the second stage in photosynthesis; in this stage, a cluster of reactions; solar light is not needed and converts carbon dioxide – among other complexes into sugars. some enzymes are involved in carbon assimilation process depend on solar light.

Sweat glands are used to regulate temperature and remove waste by secreting water, sodium salts, and nitrogenous waste (such as urea) onto the skin surface.

Cows are not immune to ticks and thanks to their hairy hides, ticks love to attack herds of cattle. Feeding off their host's blood supply, ticks spend their lives on animals of all kinds, including cows. Ticks can even transmit potentially fatal diseases to cows through their bites. The cattle tick is considered to be the most important parasite of livestock worldwide

An aggregate fruit is a fruit that develops from the merger of several ovaries that were separated in a single flower.

Urethra — this is a tube that extends from the bladder to the external opening at the end of the penis. The urethra carries both urine and sperm.

It has four main components: plasma, red blood cells, white blood cells, and platelets. Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues.

Acquired traits include things such as calluses on fingers, larger muscle size from exercise or from avoiding predators.

Red blood cells are microscopic and have the shape of a flat disk or doughnut, which is round with an indentation in the center, but it isn't hollow. Red blood cells don't have a nucleus like white blood cells, allowing them to change shape and move throughout your body easier.

Blood donors with type O- (O negative) red blood cells are referred to as universal donors and their red blood cells can be given to any other blood type. Type AB-positive blood is called the "universal recipient" type because a person who has it can receive blood of any type.