Ajuga bracteosa is indigenous to the high-altitude regions of the Himalayas, primarily found in India, Pakistan, and Nepal. It thrives in alpine meadows, rocky slopes, and forest clearings at elevations ranging from 2,500 to 4,500 meters above sea level. The plant’s adaptation to harsh environmental conditions has contributed to its resilience and survival in these regions.
As a poison
The roots of A. ferox supply the Nepalese poison called bikh, bish, or nabee. It contains large quantities of the alkaloid pseudaconitine, which is a deadly poison. The root of A. luridum, of the Himalaya, is said to be as poisonous as that of A. ferox or A. napellus.
Several species of Aconitum have been used as arrow poisons. Aconitum poisons were used by the Aleuts of Alaska’s Aleutian Islands for hunting whales. Usually, one man in a kayak armed with a poison-tipped lance would hunt the whale, paralyzing it with the poison and causing it to drown. Aconitum tipped arrows are also described in the Rig Veda.
The Irish shipbuilder Harland & Wolff constructed the British-registered Titanic.
The Titanic was constructed as a 269-meter-long maritime route between Southampton, England, and New York City.
• The world’s largest ship, the Seawise Giant, was constructed in Japan.
Analogous organs: These are structures that have similar functions and may superficially resemble each other, but they have different evolutionary origins and do not share a common ancestry.
Analogous organs arise due to convergent evolution, where different species independently evolve similar adaptations in response to similar environmental pressures.
For example, the wings of birds and insects are analogous organs as they serve the same purpose of flying but have different underlying structures and evolutionary origins.
Homologous organs: These are structures that have similar characteristics, both in terms of their structure and evolutionary origin, indicating a common ancestry.
Homologous organs share a similar basic structure but may have different functions in different species.
For example, the forelimbs of humans, bats, cats, and whales have a similar bone structure, indicating a common ancestor, but they have different functions in each species (e.g., grasping, flying, walking, swimming).
Can the wing of a butterfly and the wing of a bat be considered – homologous organs? Why or why not?
Ans: The wing of a butterfly and the wing of a bat cannot be considered homologous organs. They are analogous organs because they have similar functions (flight) but different evolutionary origins.
What is speciation?
Ans: Speciation is the process by which new distinct species arise from existing species.
Scientific Innovations for a sustainable future: Renewable Energy Technologies, Energy Storage, Electric Vehicles, Carbon Capture and Storage, Biodegradable Materials and Artificial Intelligence (AI) for Sustainability Numerous scientific innovations can contribute to a sustainable future. Here are some notable examples: Renewable Energy Technologies: Advancements in solar, wind, hydro, and geothermal energy are crucial for reducing reliance …
Scientific Innovations for a sustainable future: Renewable Energy Technologies, Energy Storage, Electric Vehicles, Carbon Capture and Storage, Biodegradable Materials and Artificial Intelligence (AI) for Sustainability Read More »
Interactive Gaming Toys: Technology has revolutionized the gaming industry, and toys have not been left behind. Interactive gaming toys combine physical play with digital elements, such as augmented reality games that utilize physical toys as game controllers or interactive gaming systems that encourage physical activity through motion sensing technology.
Question . A cross between a tall plant (TT) and a short plant (tt) resulted in progeny that was all tall plants as
(a) Tallness is the dominant trait. (b) Shortness is the dominant trait. (c) Tallness is a recessive trait. (d) The height of the plant is not governed by the gene T or t.
Ans: (a) Tallness is the dominant trait.
OUR ENVIRONMENT: OBJECTIVE/MULTIPLE CHOICE TYPE QUESTIONS for Class 10th Chapter 10 JKBOSE/NCERT OBJECTIVE/MULTIPLE CHOICE TYPE QUESTIONS QUESTION 1: The term Ecosystem was introduced by: (a) Miller (b) Haldane (c ) Tansley (d) Darwin Ans: (c) Tansley QUESTION 2. In a food chain, there are: (a) Bidirectional flow of energy. (b) Zig-zag flow of energy. (c) …