In Pedology we study about
Answer: C
Pedology is the study of soil - its formation, classification and distribution.
The name comes from the Greek pedon, ground. It is not to be confused with pedagogy, the study of teaching.
Please log in or register to report this question.
Our major foods, fibres, spices, fruits and beverage crops are
Answer: A
Our major foods, fibres, spices, fruits and beverages come from flowering plants, the angiosperms.
They are the dominant land plants, with about 300,000 species, and include every cereal, pulse, oilseed and fruit crop. Gymnosperms supply timber and resin but almost no food.
Please log in or register to report this question.
What is study of heart ?
Answer: D
The study of the heart is cardiology, from the Greek kardia.
It covers heart disease, its diagnosis and treatment. Dermatology deals with skin and demography with populations.
Please log in or register to report this question.
Primary phloem develops from
Answer: D
Primary phloem develops from the provascular (procambial) tissue.
The procambium is the primary meristem laid down behind the growing point; it gives rise to primary xylem inward and primary phloem outward. Secondary phloem comes later, from the vascular cambium.
Please log in or register to report this question.
The disease Goitre is caused in persons who do not have in their diet sufficient
Answer: C
Goitre is caused by a lack of iodine.
Iodine is needed to make thyroxine; without it the thyroid enlarges as it tries to compensate, producing the swelling in the neck. In children the deficiency also stunts growth and mental development, which is why salt is iodised.
Please log in or register to report this question.
Genes are situated on _________
Answer: A
Genes are situated on chromosomes.
Each chromosome is a single long DNA molecule with its associated proteins, and a gene is a stretch of that DNA. Sutton and Boveri proposed the chromosome theory of inheritance in 1902, and Morgan proved it with Drosophila.
Please log in or register to report this question.
The study of the way individual traits are transmitted from one generation to the next is called
Answer: D
The study of how traits are transmitted from one generation to the next is genetics.
Mendel founded it with his work on peas; William Bateson coined the name in 1905. Homology and analogy belong to comparative anatomy, ecology to the study of organisms in their surroundings.
Please log in or register to report this question.
Study of factors connected with the improvement of human race ?
Answer: B
Eugenics is the study of improving the human race by controlling who reproduces.
Galton coined the term in 1883. In the twentieth century it was used to justify forced sterilisation and worse, and it is now wholly discredited. Euthenics, by contrast, seeks improvement through better surroundings.
Please log in or register to report this question.
Which one of the following air pollution can affect blood stream leading to death ?
Answer: B
Carbon monoxide acts on the bloodstream and can kill.
It binds to haemoglobin about 240 times more strongly than oxygen does, forming carboxyhaemoglobin, so the blood can no longer carry oxygen. Being colourless and odourless it gives no warning.
Please log in or register to report this question.
Damage to hearing is caused by sounds which exceed
Answer: D
Sound above 120 decibels damages hearing at once.
That is the threshold of pain, comparable to a jet engine at close range. Prolonged exposure above 85 dB damages hearing more slowly, which is why 85 dB is the usual occupational limit.
Please log in or register to report this question.
