OAU POST UTME PRACTICE: Biology Quiz 1

The first observations of cells were made in
1665 by English scientist Robert Hooke, who used the crude microscope of his own invention to examine a variety of objects, including a thin piece of cork.
The correct option is C

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

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

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

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

Flagellation menning the presence or absence of flagellum in an organism. And it is often found in animal rather than a plant. It is used 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

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.

Meiosis occurs during gamete formation in sex-organs.
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