Read the following statements.
I. Ocean acts as the global sink for CO2.
II. The atmospheric input of carbon from rainfall is greater.
III. Carbon gas is exchanged between organisms and atmosphere during respiration.
IV. Human activities are increasing CO2 concentration in the atmosphere.
Choose the incorrect options.
Only I
II and IV
Only III
None of the above
D.
None of the above
All the above statements are correct.
CO2 or carbon- dioxide is being absorbed by the oceans, which act as a global sink. It is not clear how much more CO2 the ocean can hold. Human activities like deforestation, massive burning of fossil fuel for energy and transportation has caused an increase in the amount of CO2 in atmosphere.
The atmospheric carbon dioxide is the only source of carbon. The main pathway of carbon in carbon cycle is from the air (atmosphere) and water (hydrosere) into the living systems and back. Carbon gas is exchanged between organisms and atmosphere during respiration.
Which of the following pairs is not correctly matched?
Cholera - Vibrio cholerae
German measles - Rubella virus
Whooping cough - Bordetella pertussis
Jaundice - Pasteurella pestis
Menstrual cycle is the cyclic changes in the reproductive tract of primate females. Given below are some statements related with menstrual cycle.
I. Oestrogen is the hormone active during proliferative phase.
II. The uterine endometrium and glands grow further during secretory phase.
III. At the end of proliferative phase, corpus luteum degenerates in the ovary.
IV. The cycle ends with the menstrual phase, when menstrual flow occurs and lasts for 3-5 days.
Choose the correct option.
I, II and III
II, III and IV
I and II
III and IV
Testicular Sperm Aspiration (TESA) technique involves
collection of eggs
insemination of donated sperm into woman's uterus
collection of sperms from the testis surgically
collection of sperms from efferent ducts
Darwin in the 'theory of natural selection' states that
characters acquired during the life of an individual are inherited by its offsprings
environment does not play any role in the evolution
natural selection acts on favourable variations, which appear among individuals of a species
heritable variations arises through changes in the gene complex of species
Man And Biosphere programme (MAB) was launched by UNESCO in 1971. Which of the following is not an objective of this programme?
To provide opportunities for education and training
To promote international cooperation
To provide long term in situ conservation of genetic diversity
To provide protection to wild animals fauna
Match the following column I with column II
| Column I | Column II |
| A. Adenoma | 1. Cancer of muscular tissue |
| B. Lipoma | 2. Cancer of pigmented epithelium of skin |
| C. Glioma | 3. Cancer of glands |
| D. Myoma | 4. Cancer of glial cells of central nervous system |
| E. Melanoma | 5. Cancer of adipose tissue |
A - 1; B - 2; C - 3; D - 5; E - 4
A - 5; B - 4; C - 2; D - 1; E - 3
A - 4; B - 5; C - 1; D - 2; E - 3
A - 3; B - 5; C - 4; D - 1; E - 2
Euryhaline species denotes an animal
without osmoregulation
which lives in saline water
which has a wide range of saline tolerance
which has a wide range of temperature tolerance
The most ancient member of the genus Homo belonged to which of the following species or sub-species?
Fossilis
Sapiens
Erectus
Habilis
A food web is more realistic than food chain for showing the feeding relationship in an ecosystem because
it compares the number of consumers to the number of microorganisms in an ecosystem
food chains use only a small sampling of organisms
a food web explains why there are more producers than consumers
producers are usually eaten by many different consumers and most consumers are eaten by more than one predator
