2019 - JAMB Biology Past Questions and Answers - page 5
Only specially adapted micro-organisms are found in
Salty water
Humid air
Moist soil
Mouth cavities
Halophiles, named after the Greek word for "salt-loving", are extremophiles that thrive in high salt concentrations. While most halophiles are classified into the domain Archaea, there are also bacterial halophiles and some eukaryotic species, such as the alga Dunaliella salina and fungus Wallemia ichthyophagous.
Plants which can survive in extremely dry places are called
Mesophytes
Xerophytes
Hydrophytes
Angiosperms
A xerophyte is a species of plant that has adaptations to survive in an environment with little liquid water, such as a desert or an ice- or snow-covered region in the Alps or the Arctic. Popular examples of xerophytes are cacti, pineapple and some Gymnosperm plants. Wikipedia
The presence of ______ for swimming in a tad-pole enables it to adapt in an aquatic habitat.
Gills
Swim bladder
Tail
Fins
Tadpole's ability to swim and adapt to an aquatic habitat is because it has a tail
Possession of thin membrane enables a tapeworm to
Fasten themselves to the wall of the host's intestine
Lay numerous eggs
Absorb digested food from the host's intestine to their system
Shield themselves inside the host's intestine with anti-enzymes in order to avoid being digested
The tapeworm possesses a thin membrane because of the absorption of digested food from the intestine of the host.
Which of the following juices contains the enzyme ptyalin?
Gastric juice
Succus
Pancreatic juice
Saliva
Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine.
Which of the following essential substance is contained in vegetable?
Chlorophyll
Glucose
Mineral Salts
Carbon dioxide
Vegetable contains mineral salts like magnesium, copper and other substances which are very essential for body growth.
Good quality food will perform the following functions in human except
Supplying energy
Providing resistance against malaria
Maintaining health
Sustaining growth
Good quality food cannot provide resistance to malaria because being of good quality food does not mean it contains anti-malaria substances.
Which of the following is considered to be the first product of Photosynthesis?
Protein
Starch
Energised Chlorophyll
Hydroxyl ions
The first product of photosynthesis is sugar and it is converted into starch in all plants. The initial process of photosynthesis is the decomposition of water into oxygen, which is released and hydrogen. Direct light is required for this process.
Which of the blood corpusles are irregular and amoeloid in shape
Leucocytes
Erythrocytes
Thrombocytes
Plasma
Leucocytes, also called white blood cells, are irregular and amoeboid in shape.
Which organ removes the largest quantity of water from the blood?
Lung
Skin
Kidney
Intestine
The kidney performs quite a number of function, including helping to remove large quantity of water from the blood in order to maintain normal balance in the body system