Biology - Online Test
Q1. Which one is exclusive characteristic of living organism?
Answer : Option B
Explaination / Solution:
The most obvious and technically complicated feature of all living organisms is this ability to sense their surroundings or environment and respond to these environmental stimuli which could be physical, chemical or biological. We sense our environment through our sense organs. Plants respond to external factors like light, water, temperature, other organisms, pollutants, etc. All organisms, from the prokaryotes to the most complex eukaryotes can sense and respond to environmental cues. Hence, the correct option is Perception of events happening in the environment and their memory.
Q2. Myoglobin is found to be :
i. highly abundant in muscles of whales and seals .
ii. exhibiting cooperative binding of oxygen.
iii. allowing organisms to hold their breathe longer underwater.
i. highly abundant in muscles of whales and seals .
ii. exhibiting cooperative binding of oxygen.
iii. allowing organisms to hold their breathe longer underwater.
Answer : Option C
Explaination / Solution:
Myoglobin is found to be highly abundant in muscles of whales and seals. Myoglobin being oxygen and iron binding protein allowing organisms to hold their breathe longer underwater.
Q3. Successful graft reaction can be done by
Answer : Option D
Explaination / Solution:
Xenotransplantation is the transplantation of living cells, tissues or organs from one species to another. Such cells, tissues or organs are called xenografts or xenotransplants.
Successful graft reaction can be done by using Xenotransplantation to get two kinds of products from single plant.
Q4. A dark stained body present in the somatic cells of human female but absent from those of male is
Answer : Option D
Explaination / Solution:
Barr body is present in somatic cells of human female but it is absent in male. The function of this body is still not known completely.
Q5. Which one will reduce the rate of transpiration?
Answer : Option C
Explaination / Solution:
Transpiration takes place through stomata. Decrease in light intensity closes the stomata that ultimately results into reduction in rate of transpiration.
Q6. Intercalated discs occur in
Answer : Option B
Explaination / Solution:
In between cardiac muscle fibres, there are communication junctions which are made up of intercalated discs.
Q7. Which of the following organisms were placed together under algae?
Answer : Option B
Explaination / Solution:
The character of possessing cell wall in their cells grouped together the unicellular organisms and the multicellular ones, for example, Chlamydomonas and Spirogyra were placed together under algae.
Q8.
T 3
Thyroid gland do not secrete
Answer : Option C
Explaination / Solution:
Melatonin hormone is secreted by Pineal Gland.
Q9. For which of the following would you expect distribution range to be badly affected if average Global temperature keeps increasing:
Answer : Option A
Explaination / Solution:
A majority of organisms are restricted to narrow range of temperature. Such organisms are called stenothermal species. The distribution range of these species will be adversely affected if average global temperature keeps increasing.
Q10. The morphological changes are indicative of certain element deficiencies and are called
Answer : Option B
Explaination / Solution:
Deficiency symptoms are morphological changes in plants, indicating nutrient deficiency. Deficiency symptoms vary from one element to another.
