Question Library

Continuous variation is a type of variation where there are no clear differences between two extreme individuals, and instead there is a gradual change from one extreme to another. Morphological variations are changes in the physical appearance of individuals of the same species. e.g height, weight, eye colour etc Physiological variation refers to the differences in physiological function between individuals of the same species. e.g taste, rolling of the tongues, blood type etc

In vascular plants, xylem tissue is responsible for transporting water and dissolved minerals from the roots to the leaves. Xylem is a vascular tissue, along with phloem, which is the other main transport system in plants.

The causative agent of tuberculosis (TB) is the bacterium Mycobacterium tuberculosis. TB is a contagious disease that spreads through the air when people with active TB in their lungs cough, sneeze, or spit.

The lungs are the respiratory organ in mammals.They are the primary respiratory organs in mammals. They are located in the thorax, on either side of the mediastinum. The lungs take in oxygen from the air and release carbon dioxide, which oxygenates the blood.

The Guinea savanna is a vegetation zone in Nigeria that covers more than half of the country's land area. It's characterized by short trees and tall grasses. Kwara State is located in the Northern Guinea savanna, at the southern border of the Niger River. Other states in the Northern Guinea Savanna include: Niger, Taraba, Kaduna, Bauchi, Benue, and Kogi.

Jean-Baptiste Lamarck proposed the theory of use and disuse of organs, also known as Lamarckism Darwin's theory of evolution, also known as Darwinism, explains how species evolve over time through natural selection. Jean-Baptiste Lamarck repeated the ancient folk wisdom of the inheritance of acquired characteristics. De Vries held that new species arrive suddenly and without prior precedent through the process of mutation. The mutation Theory of Evolution was proposed by Hugo de Vries.

A simple fruit is a fruit that develops from a single flower with one ovary or multiple fused carpels. The ovary wall ripens into a single fruit, separate from other ovaries.E.g Apples, Oranges, peaches, Lemon, melon etc A multiple fruit is a type of fruit that develops from the ovaries of many flowers growing in a cluster or that are fused together into a larger fruit. E.g Pineapple A fruit that develops from a single flower with multiple carpels is called an aggregate fruit. Examples include Raspberry, strawberry, and Blackberry. A false fruit is a fruit that develops from parts of a flower other than the ovary. False fruits are also known as pseudo fruits or accessory fruits.E.g Pear, Cashew

Liverworts are found in the ground layer of a tropical rainforest, along with other plants like ferns, wildflowers, moss, and sedges. Liverworts are non-vascular plants, meaning they don't have roots or vascular tissue, and instead absorb nutrients and water from the air through their leaves.

The pituitary gland is located at the base of the brain, in the sella turcica, an indent in the sphenoid bone. It's directly below the hypothalamus, and behind the bridge of the nose.

Combustion is a process that takes place in the carbon cycle, while transpiration is not. Combustion is the process of burning organic materials, such as fossil fuels, wood, paper, plastics, and cloth, in the presence of oxygen. This releases carbon dioxide and water vapor into the atmosphere. Nitrification is a biological process that converts ammonia (NH3)into nitrite (NO2) and then nitrate (NO3).

Hypogeal germination is a type of seed germination that occurs below ground, where the cotyledons remain below the soil. Hypogeal germination occurs in both monocotyledonous seeds including paddy, wheat, maize, etc. and dicotyledonous seeds, including pea, mango, groundnuts, etc.

Similar structures that are modified to work in different ways in different organisms are called homologous structures. Homologous structures are physical features that are similar in organisms that share a common ancestor, but have different functions. For example, the limbs of humans, cats, whales, and bats are homologous structures.

Schistosomiasis, also known as bilharzia or snail fever, is a parasitic disease caused by blood flukes that live in freshwater snails. The larval form of the parasite, called cercariae, emerges from the snail and contaminates water. People become infected when their skin comes into contact with the contaminated water. Treating water sources with chemicals to kill snails (molluscicides) can reduce the number of infective larvae.This will help control the snails.

The central nervous system (CNS) is made up of the brain and spinal cord: Brain: Controls how we think, feel, move, and learn. Spinal cord: Carries messages between the brain and the nerves that run throughout the body.

I - Paramylum granules II - Contractile vacuole III- Chloroplasts IV- Nucleus The chloroplasts is the plant-like feature of euglena, which enables it to carryout photosynthesis.