Fill in the blanks ____ is a biosphere reserve located in West Bengal
Sundarbans is a biosphere reserve located in West Bengal.
Question ID: 441
Uploaded on: October 7, 2024
State True or False Gibberellin hormone prevents immature shedding of the leaf of plants.
True
Reasons: Gibberellins are plant hormones that promote cell division and elongation. They can also prevent the abscission of leaves, which is the natural process of leaf shedding.
Question ID: 442
Uploaded on: October 7, 2024
State True or False Ovum is only produced as a result of mitosis.
False.
Reasons: The ovum, or egg cell, is produced by meiosis, not mitosis. Meiosis is a type of cell division that reduces the number of chromosomes in half.
Question ID: 443
Uploaded on: October 7, 2024
State True or False Self–pollination can be exercised in pea plant flowers according to the need.
True.
Reasons: Pea plant flowers have both male and female reproductive organs. This means that they can self-pollinate, which is the process of pollen from the same flower fertilizing the egg cell.
Question ID: 444
Uploaded on: October 7, 2024
State True or False The fundamental tenet of the evolutionary theory of Darwin is the process of natural selection.
True.
Reasons: Charles Darwin's theory of evolution by natural selection is based on the idea that individuals with traits that make them better suited to their environment are more likely to survive and reproduce.
Question ID: 445
Uploaded on: October 7, 2024
State True or False A degradable pollutant is responsible for biomagnification.
False.
Reasons: Biomagnification is the process by which pollutants become more concentrated as they move up the food chain.
Question ID: 446
Uploaded on: October 7, 2024
State True or False Flagella is the locomotory organ of Paramecium.
False.
Reasons: Flagella is not the locomotory organ of Paramecium. Paramecium is a single-celled organism belonging to a group of ciliates. It moves using numerous hair-like structures called cilia.
Question ID: 447
Uploaded on: October 7, 2024
Match the right column with the left column: (Any five)
Column–A
Column–B
2.13) Blind Spot
a) Pollution of groundwater
2.14) Cytokinesis
b) The point of connection of the retina and optic nerve
2.15) 44A+XY
c) Homologous organs
2.16) Wings of bats and birds
d) Formation of cell plates
2.17) Arsenic
e) Pollen grain
2.18) Transfer to stigma
f) Sound pollution
g) Chromosomal attachments of human male
2.13) Blind Spot → b) The point of connection of the retina and optic nerve
2.14) Cytokinesis → d) Formation of cell plates
2.15) 44A+XY → g) Chromosomal attachments of human male
2.16) Wings of bats and birds → c) Homologous organs
2.17) Arsenic → a) Pollution of groundwater
Question ID: 448
Uploaded on: October 7, 2024
Choose the odd one and write it: TSH, ACTH, GTH, CSF
CSF
Explanation: TSH (Thyroid-stimulating hormone), ACTH (Adrenocorticotropic hormone), and GTH (Gonadotropin hormone) are all hormones produced by the pituitary gland.
Question ID: 449
Uploaded on: October 7, 2024
Write one function of the myelin sheath.
Myelin sheath increases the rate of transmission of nerve impulses.
Question ID: 450
Uploaded on: October 7, 2024
A pair of related terms is given below. On the basis of the relationship in the first pair write the suitable word in the gap of the second pair. Prophase: Disappearance of nuclear membrane and nucleolus:: ___: Reappearance of nuclear membrane and nucleolus.
Telophase
Question ID: 451
Uploaded on: October 7, 2024
Give an example of a variation inherited in man along with the generation.
Attached ear/ Common tongue
Question ID: 452
Uploaded on: October 7, 2024