2019 - JAMB Biology Past Questions and Answers - page 2
One of the major ways in which the blood is able to defend the body against disease causing organisms is
Absorption of fatty acids and glycerol
Clumping
Single circulation
Translocation
Agglutination or clumping is one of the ways in which the blood is able to defend against disease.
Which of the following is not a transmittable character in plants
Habit of growth
Resistance to environmental factors
Life span
Haemophilia
Haemophilia is a mostly inherited genetic disorder that impairs the body's ability to make blood clots, a process needed to stop bleeding. This results in people bleeding for a longer time after an injury, easy bruising, and an increased risk of bleeding inside joints or the brain.
Transmittable Characters In Plants: Size or weight of Fruit. Size of Leaf. Taste of Fruit. Food content of Fruit.
Inheritable character/features possessed by an organism can be referred to as
Genes
Locus
Traits
Allelo morphs
Trait is an inheritable character possessed by an organism.
One of the following is a process of transmission of hereditary characteristics by chromosomes
Genes relating to the same character occupy identical locations on the chromosomes
Separation of homologous chromosomes into four daughter cells
Separation of gametes during fertilization
Dictating the formation of a protein by a gene in a chromosome
The characteristics or traits of parents are transmitted to their progeny (offsprings) through genes present on their chromosomes during the process of sexual reproduction
The attachment of the embryo to the wall of the uterus is called
Ovulation
Implantation
Gametogenesis
Placentation
Implantation is a process in which a developing embryo, moving as a blastocyst through a uterus, makes contact with the uterine wall and remains attached to it until birth. The lining of the uterus (endometrium) prepares for the developing blastocyst to attach to it via many internal changes
Which of the reproductive system in mammals secretes a part of the seminal fluid which raises the pH of the fluid in the female reproductive system?
Cowper's gland
Prostate gland
Vas deferens
Seminal Vesicle
The Cowper's gland (also called Bulbourethral gland) is a reproductive system in male which secretes a part of the seminal fluid which raises the pH of the fluid in the female reproductive system.
The part labelled a in the above diagram is used for
Detection of pressure in water
Maintaining buoyancy in water
Gaseous exchange
Movement in water
The operculum is a series of bones found in bony fish that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding.
The above organism can be classified under which phylum in the animal kingdom
Nematoda
Chordata
Porifera
Annelida
The tilapia fish belongs to the class Chordata phylum in the animal kingdom.
One important characteristics of green plant is that they
possess specialized sense organs
Are usually motile
Are autotropic
Respond slowly to stimuli
One of the important characteristics of green plants their ability to manufacture their food through autotrophic modes of nutrition)
Autotrophs:
those organisms that can make food themselves from simple substances like carbon dioxide and water are called autotrophs. Their mode of nutrition is referred to as autotrophic.
Characteristics of Plants
- Photosynthesis
- Cuticle
- Cell Walls
- Reproduction
A virus can sometimes be regarded as a living organism because it
causes diseases in plants and animals
It exists in a variety of shapes
Is easily visible with the aid of an electron microscope
Reproduces in living cells
Because a virus can reproduce in living cells. Viruses can also be inanimate when not in living cells.