Both intraspecific and interspecific struggles might be observed among the different types of tigers in a forest

Match the words in column-A with the most appropriate words in column B and re-write the correct pair mentioning the serial no. of both columns COLUMN - A COLUMN - B 1. Meninges (a) Decrease in the number of digits in the legs 2. Sexual reproduction (b) Submergence of islands 3. Roller tongue (c) Centromere 4. Evolution of the horse (d) Telomere 5. Environmental problem of Sundarban (e) Protects brain and spinal cord from mechanical injury 6. Attaches chromosome with spindle fibre (f) Controlled by autosome (g) Occurs through the production of gametes and their union

Explain the following three problems related to ever-increasing human population- Over-exploitation and depletion of natural resourcese Changes in atmospheric condition and global warming Deforestation and loss of ecosystems Two major causes behind the loss of biodiversity are over-exploitation and destruction of habitat due to change in land use pattern - establish the validity of the statement with proper example. [3+2=5] Or What might be the reasons behind the disturbances in Nitrogen Cycle ? It is very much essential to publish a PBR document for each village of India — which information can be gathered from a PBR regarding biodiversity ? [3+2=5]

One of the problems associated with the ever-increasing population is the destruction of wetlands. Mention any two consequences of this.

Explain the relationship between the decline in the number of biodiversities with that of over-exploitation with the help of two examples. Construct a mental map of problems caused by ever-increasing human population. [3 + 2]

Column–A Column–B 2.13. ADH (a) Decline in Wetland 2.14. Amitosis (b) Convergent Evolution 2.15. Thalassaemia (c) Palash (Flame of the forest) 2.16. Analogous organ (d) Spindle fibre is not formed 2.17. Increase in human population (e) Decreases the volume of urine through reabsorption of water from the distal convoluted tubule of nephron 2.18. Ontholiphonus flower of Paddy (f) Paddy (g) Recessive Mutant gene located on Autosome

If the temperature and acidity of sea-water increase what effects would it impose on marine biodiversities?

Which of the following are the refractive media of the eye? (a) Cornea, aqueous humour, lens, vitreous humour (b) Retina, aqueous humour, lens, vitreous humour (c) Cornea, retina, lens, iris (d) Aqueous humour, iris, vitreous humour, cornea

In which of the following crosses, will the F1 generation seed's tall and dwarf traits appear in a 1:1 ratio? (a) Tt x Tt (b) TT x Tt (c) TT x tt (d) Tt x tt

What will be the phenotypic ratio of progeny obtained from the hybridization between YyRR and YYrr genotypes? (a) 2:1 (b) 1:2 (c) 2:2 (d) 1:4

If a population undergoes three generations, and if each generation consists of only males, what is the probability that females will be present in the fourth generation? (a) 100% (b) 0% (c) 50% (d) 75%

Choose the odd word and write it: Hypothalamus, Pons, Medulla Oblongata, Cerebellum