The question asks to identify the type of plant tissue that forms the husk of a coconut. This requires knowledge of different plant tissues and their functions, particularly their structural roles in various parts of plants.
C) Sclerenchyma — Sclerenchyma tissue is characterized by thick, lignified cell walls, providing mechanical strength and rigidity. The husk of a coconut, which is tough and fibrous, is primarily composed of sclerenchymatous fibers and sclereids, offering protection to the inner seed.
The question asks to identify the plant tissue responsible for water transport. This requires knowledge of the functions of various plant tissues, particularly the vascular tissues.
B) Xylem — Xylem is the primary water-conducting tissue in plants. It consists of tracheids, vessels, xylem parenchyma, and xylem fibers, all working together to transport water and dissolved minerals from the roots upwards to the leaves and other aerial parts of the plant.
UPSC - 2019
The question asks to identify the incorrect statement regarding Hepatitis B and C viruses compared to HIV. We need to evaluate each statement based on current medical knowledge about transmission, vaccination, prevalence, and symptom manifestation of these viruses.
Based on the analysis, Statement B is the incorrect one.
Correct Option: B) Hepatitis B, unlike Hepatitis C, does not have a vaccine.
This question asks to identify the specific type of connective tissue responsible for connecting muscles to bones. Understanding the basic functions of different connective tissues in the human body is key to answering this question.
C) Tendon — Tendons are strong, fibrous connective tissues that attach muscles to bones. They are crucial for transmitting the force generated by muscle contraction to the bones, thereby enabling movement. For example, the Achilles tendon connects the calf muscles to the heel bone.
The question asks to identify the connective tissue responsible for connecting bones to other bones. This is a fundamental concept in human anatomy and physiology, specifically related to the skeletal and muscular systems.
Correct Option: A) Ligament — Ligaments are tough, fibrous connective tissues that connect bones to other bones, forming joints and providing stability.
The question asks to identify the muscle type that is involuntary and found in internal organs. We need to recall the characteristics and locations of the three main types of muscle tissue: skeletal, smooth, and cardiac.
Correct Option: B) Smooth muscle — Smooth muscle is characterized by being involuntary and is found in the walls of hollow internal organs such as the stomach, intestines, bladder, and blood vessels. Its contractions are not under conscious control.