Test Your Scientific Knowledge

Nerve cells are responsible for conducting messages throughout the body. They are specialized cells that make up the nervous system and play a crucial role in transmitting electrical signals, enabling communication between different parts of the body. Unlike skin cells, blood cells, or kidney cells, nerve cells have unique structures and functions that allow them to carry out this important task.

Mammals are the only animals that possess glands that produce milk. This is a distinguishing characteristic that sets them apart from other animals. While some mammals, like humans, have highly developed mammary glands for breastfeeding their young, even the most primitive mammals have some form of milk-producing glands to nourish their offspring. This unique ability to produce milk is a defining feature of the mammalian class.

The large leaves found in seedlings growing in the forest have the primary function of gathering as much light as possible for photosynthesis. Photosynthesis is the process by which plants convert sunlight into energy, and leaves play a crucial role in this process by capturing sunlight and using it to produce food for the plant. The larger the leaves, the more surface area they have to absorb sunlight, maximizing the plant's ability to photosynthesize and grow.

The correct answer is "Egg>>caterpillar>>pupa>>butterfly>>Egg". This is because, similar to the life cycle of a frog, the development of a butterfly also involves a complete change in physical appearance through different stages. The process starts with an egg, then goes through the caterpillar stage, followed by the pupa stage, and finally, the adult stage as a butterfly. The cycle then starts again with the laying of eggs.

In the solid state, the iron atoms are closely packed together and have a regular arrangement, which makes them more dense. In the liquid state, the iron atoms have more freedom of movement and are less closely packed, resulting in a slightly lower density. Therefore, a single iron atom in the solid state is the same size as a single iron atom in the liquid state.

The correct answer is that the moon and the earth are made up of the same basic elements. This means that both the moon and the earth contain similar types of atoms and chemical elements in their composition. This is supported by scientific evidence and studies that have analyzed the composition of both celestial bodies.

The correct answer is Nitrogen, Oxygen, Carbon Dioxide. This is because nitrogen makes up about 78% of the Earth's atmosphere, while oxygen makes up about 21%. Carbon dioxide, on the other hand, is present in much smaller quantities, making up less than 1% of the atmosphere. Therefore, nitrogen is the most abundant gas, followed by oxygen, and then carbon dioxide.

The study aims to determine if eating yogurt can lessen the side effects of antibiotics, specifically diarrhoea. Therefore, the most relevant factor to measure would be the incidence and severity of diarrhoea. This would provide information on whether or not yogurt consumption has an impact on reducing the side effects of antibiotics in terms of diarrhoea. Measuring the frequency and duration of fever, the water loss caused due to diarrhoea, or the count of pathogenic bacteria in the blood would not directly provide information on the effectiveness of yogurt in reducing antibiotic side effects.

Some white blood cells are able to change shape, which allows them to engulf and digest harmful bacteria within the human body. This ability is similar to how amoeba engulf their food. By changing shape, white blood cells can surround and engulf bacteria, forming a protective barrier around them. Once engulfed, the white blood cells can then digest and destroy the bacteria. The presence of a nucleus, the ability to divide, and the absence of any haemoglobin are not directly related to the process of engulfing and digesting bacteria.