The process by which water enters the root hairs from the soil is:
A. Osmosis
B. Active transport
C. Diffusion
D. Transpiration pull
Answer: Option A
Solution (By JKExamLibrary)
Water moves from the soil (high water potential) into root hair cells (lower water potential due to solutes) by osmosis across the semipermeable membrane. Active transport is for minerals, transpiration pull is for upward movement.
Explanation:
Diabetes mellitus is characterized by hyperglycemia due to insufficient insulin secretion (Type 1) or insulin resistance (Type 2). Diabetes insipidus is due to deficiency of ADH (vasopressin) affecting water reabsorption. Graves' disease is hyperthyroidism, Addison's is adrenal insufficiency. Insulin deficiency leads to inability of cells to uptake glucose.
Explanation:
Plastics are synthetic polymers that resist microbial decomposition and persist in the environment for hundreds of years, causing pollution. Paper, cotton, and vegetable waste are biodegradable and broken down by decomposers.
Explanation:
Alveoli are thin-walled air sacs where O₂ and CO₂ exchange occurs. The voice box is the larynx; diaphragm is skeletal muscle; pulmonary veins carry oxygenated blood.
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