Mumbai University Engineering Question Papers Solution Sem 5

Explanation: This question asks you to identify a type of mammal that reproduces by laying eggs instead of giving birth to live young. Mammals are typically known for characteristics such as having hair or fur, being warm-blooded, and feeding their young with milk produced by mammary glands. However, there exists a small, unique group of mammals that differ from the majority in their reproductive method. These are primitive mammals that combine traits of reptiles and mammals.

To reason this out, think about the classification of mammals into three main groups: placental mammals, marsupials, and monotremes. Placental mammals develop their young inside the womb, while marsupials give birth to underdeveloped young that continue growing in a pouch. Monotremes, however, are distinct because they lay eggs. Only a very limited number of species fall under this category, and they are mostly found in specific regions like Australia and nearby areas.

An easy way to understand this is to imagine an Animal that behaves like a mammal—producing milk and having fur—but reproduces like a reptile by laying eggs. This rare combination makes it stand out among all mammals.

In summary, the question tests your knowledge of mammalian classification and highlights the existence of a rare group of egg-laying mammals with both reptilian and mammalian features.

Explanation: This question focuses on the total number of bones present in a fully developed human body. The human skeletal system provides structure, protects internal organs, and enables movement by working with muscles. It is important to note that the number of bones changes as a person grows from infancy to adulthood due to the fusion of certain bones over time.

At birth, humans have a higher number of bones, many of which are made of cartilage and gradually ossify (harden) into bone. As growth continues, some bones fuse together, especially in areas like the skull, spine, and pelvis. This fusion reduces the overall count of bones by the time a person reaches adulthood.

To solve such a question, you should recall the standard anatomical count used in Biology for an adult human. This includes bones in the axial skeleton (such as the skull, vertebral column, and rib cage) and the appendicular skeleton (limbs and girdles). Memorizing this number is common in basic Biology and General Knowledge studies.

For example, you can think of the skeleton as a framework that becomes more compact and efficient as a person matures, with fewer but stronger bones.

In summary, the question evaluates your understanding of human Anatomy and the developmental changes in the skeletal system from infancy to adulthood.

Explanation: This question is asking you to identify the bone in the human body that has the greatest length, strength, and Mass. The human skeleton is composed of many bones that vary in size, shape, and function, each adapted to perform specific roles such as support, movement, and protection of organs. Some bones are small and delicate, while others are large and built to withstand significant stress.

To reason through this, consider the bones involved in movement and weight-bearing. The largest bones are typically found in the limbs, particularly in the lower part of the body, because they must support the entire body weight and enable activities like walking, running, and jumping. These bones are usually long, dense, and strong to handle continuous mechanical pressure.

Think of how the body distributes weight from the upper body to the ground. The bone that connects the hip to the knee plays a crucial role in this process and must be extremely strong and long compared to others.

In summary, the question checks your understanding of skeletal structure and highlights the importance of weight-bearing bones in the human body.

Explanation: This question focuses on identifying the typical internal temperature range that indicates a healthy human body. Body temperature is an important vital sign that reflects how well the body maintains homeostasis, which is the balance of internal conditions necessary for survival. It is regulated by the brain, specifically the hypothalamus, and can vary slightly due to factors like time of day, activity level, and Environment.

To approach this, recall that the human body operates best within a narrow temperature range. If the temperature rises too high, it may indicate fever or infection, while a significantly lower temperature could suggest hypothermia. Therefore, a standard reference value is commonly used in medicine and daily life to represent normal conditions.

You can think of it like a thermostat in a room that keeps the Environment comfortable. Similarly, the body maintains a stable temperature to ensure proper functioning of enzymes and metabolic processes.

In summary, this question tests your awareness of basic Health indicators and the standard temperature range that signifies a healthy and well-regulated human body.

Explanation: This question asks you to understand the reason behind the glowing appearance of a CAT’s eyes when Light falls on them in low-Light or dark conditions. Many nocturnal or crepuscular animals have special adaptations that help them see better in dim lighting, and this visual effect is one such adaptation.

To reason this out, consider how Light enters the eye. In most animals, Light passes through the retina and is absorbed. However, in certain animals, there is a reflective layer behind the retina that sends Light back through it, effectively giving the photoreceptor cells a second chance to detect Light. This enhances vision in low-Light environments.

When external Light, such as from a flashlight or car headlights, hits this reflective layer, it bounces back out of the eye, creating the appearance of glowing eyes. This is especially useful for animals that hunt or move around at night.

An easy analogy is a mirror placed behind a thin curtain. Light passes through the curtain, hits the mirror, and reflects back, making the curtain appear brighter.

In summary, the question highlights a biological adaptation that improves night vision and causes the visible shining effect in certain animals’ eyes.

Explanation: This question is about identifying the earliest Animal that humans successfully tamed and adapted for their use. Domestication refers to the process by which humans selectively breed and care for animals over generations, leading to changes in behavior, appearance, and utility. This process played a major role in the development of human civilization.

To reason through this, think about early human societies and their needs. Primitive humans required assistance in hunting, protection from predators, and companionship. The first domesticated Animal would likely have been one that could live closely with humans, adapt to their Environment, and provide practical benefits.

Over time, humans domesticated various animals for Agriculture, transportation, Food, and labor. However, the earliest domesticated species had a unique relationship with humans, often involving mutual benefit and cooperation.

You can imagine early humans forming bonds with certain animals that gradually became more dependent on human communities, eventually leading to full domestication.

In summary, the question evaluates your understanding of early human-Animal relationships and the origins of domestication in human History.