1. In which among the following categories, Nepenthes khasiana or Indian Pitcher Plant can be placed?
[A] Saprophyte
[B] Xerophyte
[C] Insectivorous
[D] Halophyte
Show Answer
Correct Answer: C [Insectivorous]
Notes:
Nutrition is plants is classified into two main categories: autotrophic and heterotrophic. Heterotrophic plants are further classified into saprophytes, parasite and insectivores.
Saprophytes are those plants which grow and live on dead organic matter including animal and plant remains
Insectivorous plants are autotrophic but develop adaptations to trap insects in order to supplement the deficiency of Nitrogen in the soil. They feed on insects. They are generally found in nitrogen deficient habitats and hence to compensate the loss, they use insects as a source of nitrogen.
2. Least generative power is a feature of which among the following cells of Human Body?
[A] Brain
[B] Bones
[C] Skin
[D] Liver
Show Answer
Correct Answer: A [Brain]
Notes:
The human brain is the central organ of the human nervous system, and with the spinal cord makes up the central nervous system. It is considered to have the Least generative power.
3. Which among the following conditions will give birth to Fraternal Twins?
[A] a single egg is fertilized to form one zygote which then divides into two separate embryos
[B] sperm cells fertilize both the ovum and the second polar body
[C] two eggs are independently fertilized by two different sperm cells
[D] none of the above
Show Answer
Correct Answer: C [two eggs are independently fertilized by two different sperm cells]
Notes:
Fraternal twins are also called as dizygotic twins. In this type of pregnancy two eggs are independently fertilized by two different sperm cells. These types of twins may be of the same or different sexes.
4. Which part of the plant Raphanus sativus is edible?
[A] Fruit
[B] Leaves
[C] Roots
[D] All the above
Show Answer
Correct Answer: D [All the above]
Notes:
Raphanus sativus is Radish. The Edible parts are roots, but Radish leaves and seedpods which are fruits are also edible.
5. Which among the following is correct about biocenosis?
[A] The study of energy transformations in the living systems
[B] Community of organisms occupying an area
[C] Study of the parts of an ecosystem with specific species
[D] A kind of abnormality related to organism living in a particular habitat
Show Answer
Correct Answer: B [Community of organisms occupying an area]
Notes:
The term Biocenosis was coined by Karl Mobius in 1877. It describes the interacting organisms which are living together in a habitat or biotope. The use of this term has declined in the 21st Century.
6. Which among the following is a correct definition of Hematocrit?
[A] proportion of blood volume that is occupied by red blood cells
[B] proportion of blood volume that is occupied by white blood cells
[C] proportion of blood volume that is occupied by Leucocytes and Thromobocytes
[D] proportion of blood volume that is occupied by plasma
Show Answer
Correct Answer: A [proportion of blood volume that is occupied by red blood cells]
Notes:
Hematocrit levels are used in doping tests of Athletes , (the RBCs are carriers of Oxygen). hematocrit levels also denotes the blood iron. hematocrit levels of 38 or higher are normally suitable for the donors to donate their blood. Here please note that sometimes its is asked in exams about the ion which can help better in blood coagulation and normally options given are Ca, Na, K & Fe+3. The obvious answer is Fe+3.
7. Which among the following option would normally have the highest Biological Oxygen Demand (BOD)?
[A] A running river
[B] A running polluted river
[C] Untreated Municipal waste water
[D] Ocean water
Show Answer
Correct Answer: C [ Untreated Municipal waste water]
Notes:
BOD is amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period, for running rivers, it would be minimum and for Untreated Municipal waste water it would be maximum.
8. Which among the following animals is closest to corals in evolutionary terms?
- Sea Cow
- Sea Horse
- Sea Lion
- Sea Anemone
Select the correct answer using the codes given below:
[A] Only 1
[B] Only 2
[C] Only 3
[D] Only 4
Show Answer
Correct Answer: D [Only 4]
Notes:
Corals and sea anemones both belong to Phylum Cnidaria, sharing similar evolutionary lineages as simple, radially symmetrical, aquatic invertebrates. Sea cow (mammal), sea horse (fish), and sea lion (mammal) are distantly related and do not share this close evolutionary relationship with corals. Hence, option 4 is correct.
9. Why does running up stairs make a person feel more tired than walking?
[A] He does more work when running than walking
[B] His power output is greater when running than walking
[C] His gravitational force is greater when running
[D] He has more inertia when running than walking
Show Answer
Correct Answer: B [His power output is greater when running than walking]
Notes:
Running up stairs requires the same work but in less time, increasing power output. Higher power leads to more rapid energy use, causing greater fatigue. Work (energy) is force times distance, but power is work divided by time, which is higher when running.
10. Dehydration in human body is caused due to the deficiency of which of the following?
[A] Water
[B] Hormones
[C] Vitamin
[D] Salt
Show Answer
Correct Answer: A [Water]
Notes:
Dehydration is a deficiency of water in thebody. Vomiting, diarrhea, excessive sweating, burns, kidney failure, and use of diuretics maycause dehydration. People feel thirsty, and asdehydration worsens, they may sweat less and excrete less urine.
