OAU POST UTME PRACTICE: Biology Quiz 1

Mangrove vegetation occurs in the Niger -Delta It thrives in marine and brackish habitat.
Mangrove vegetation in Nigeria is dominated by red mangrove. Rhizophora racemosau and
Laguncularia racemosa. These biomes is characterized by heavy rainfall almost throughout the year.
The correct option is A

Sponges are simple aquatic invertebrates that do not move about but are attached to rocks or shells. They live in colonies. They are primitive multicellular animals with symmetrical bodies.
Ascaris is a genus of parasitic nematode worm known as the small intestinal roundworms which are a type of helmith.
Taenia is a genus of tapeworm that include some important parasites of livestock. They are morphologically characterized by a ribbonlike body composed of a series of a segment called proglottides.
Nereis is a group of polychaete worms in the family Neridae. It comprises many species, most of which are marine including the sandworm.
The correct option is D

Generally, the quantity of rainfall in Nigeria and worldwide determines to a large extent the type of vegetation of each biome or habitat.
Where rainfall abundantly throughout the year, the vegetation is dense rainforest.
The correct option is D.

Prokaryotic cell (e.g. bacteria cells, blue-green algae) difter from eukaryotic cells by having no nuclear membrane. In a prokaryotic cell, nuclear materials are not enclosed in the well defined nuclear membrane, unlike eukaryotic cells where nuclear materials are clearly separated from the cytoplasm by means of the nuclear membrane. A form of advancement over the prokuryotic cell.

Wuchereria bancrojii
The correct option is D
is a nematode
(roundworm) which invade the lymphatic vessel to cause filariasis or in a chronic condition, it muy result in elephantiasis. The vector is u mosquito.
The correct option is C

Ecological niche combines the idea of spatial habitat with the functional relationships of the organism. An organism’s niche thus describes both its location and job (e.g. pollinator, decomposer, predator e.t.c within a particular community or ecosystem.
Habitat refers to a place where an organism lives naturally.
The correct option is A

Ecosystem is a community of organism and their physical environment interacting as an ecology unit. It is the basic functional unit in nature.
The correct option is B.

Food chain is the pathway along which food energy is transferred from trophic level to trophic level, beginning with producers.
Grass → Grasshopper → Toad → Snake → Hawk
The correct option is B

The mitochondria are double-membrane envelopes. The region between the outer and inner membranes, which is filled with liquid, is known as the outer compartment. The inner membrane has numerous folds called cristae.
Cristae are the sites of ATP synthesis, and their folded structure greatly increases the surface area where ATP synthesis occurs.
Transport proteins, molecules called electron transport chains, and enzymes that synthesize ATP are among the molecules embedded in the cristae. The cristue enclose a liquid-filled region known as the inner compartment, or matrix, which contains a large number of enzymes that are used in the process of acrobic respiration for classification in animals especially lower animal and not used for classification in plants.
Fucoxanthin is merely a type of pigment not a means of classification or grouping of piants
The correct option is D

High altitude is associated with lower average temperature and a greater diurnal temperature, high temperature (including snow), increase wind speed, more intense radiation, lower atmospheric pressure all of which have influence on plants and animal life. Note that high altitude is associated with high precipitation and not lower precipitation.
The correct option is C