OAU POST UTME PRACTICE: Biology Quiz 1

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

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

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.

Seedless plants include bryophyles, (mosses & liverwort), pteridophytes (e.g. fern plant), thallophyles (c.g. red, brown & green algac).
Gymnosperms bear seed which is naked and are only borne on special compartment called cones (e.g. conifers).
Fungi is not a plant; it belongs to a separate kingdom. Bacteria are not classified as a plant as they also belong to a separate kingdom (moncran).
The correct option is D

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

Biotic component is the living component of the ecosystem. They involve plants and animals of a community which interact by feeding upon one another and competing for the available supply of such things as water and light as a result, biotic component of an ecosystem can be called organisms.
The correct option is B

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.

Mitosis is a process of nuclear division in eukaryotic cells conventionally divided into five
stages: prophase, prometaphase, metaphase, anaphase, and telophase. Mitosis conserves chromosome number by allocating replicated chromosomes equally to each of the daughter nuclei.
At Metaphase
• The chromosomes have become even more condensed
• The microtubules
extending from each
centrosome can now invade the nuclear area
• The chromosomes have all arrived at the metaphase plate or equatorial plane, a plane that is equidistant between the spindle’s two poles.
• The centrosomes are now at opposite poles of the cell.
• The chromosomes’ centromeres lie at the metaphase plate
Note in some textbooks which don’t include prometaphase
in the phases of mitosis
metaphase will be the second phase of mitosis.
The correct option is C</strong