Every Day Science MCQs with Explanations

Explanation

TYPES OF JOINTS Joints are classified according to the kind of material holding the bones together and the relative freedom and kind of motion at the particular joint. 1. Fibrous Joints: Varying degrees of motion, from none to some, are possible in fibrous joints. (1) Syndesmosis. When the bones are held together by FCT (fibrous connective tissue), the joint is referred to as a syndesmosis. SYN = together DESMOS = fiber (a tying material) Example: The inferior tibio-fibular joint. (2) Suture. When the bones are quite close together with a minimum of FCT, the joint is known as a suture. Example: the joints between the cranial bones. 2. Bony Joints: Should the bones be united by bony material, the joint is referred to as a synosteosis. SYN = together OSTEO = bone Example: The frontal bone. (The frontal bone of the skull is actually a bony fusion of two bones. Approximately 10 percent of the time, this fusion fails to take place; the original suture between the bones remains and is called a metopic suture.) 3. Cartilagenous Joints : These are also nonmovable joints. (1) Synchondrosis. A cartilagenous joint in which the bones are held together by hyaline cartilage. SYN = together CHONDRO = cartilage Example: Epiphyseal plate. (2) Symphysis. A cartilagenous joint in which the bones are held together by a disc of fibrocartilage. Example: Pubic symphysis. 4. Synovial Joints : In the synovial type of joints, the bones move on one another so as to allow various motions of the body parts. The “ovial” part of the name refers to the fact that the fluid substance seen in this type of joint appeared to the old anatomists to be like raw egg white (ovum = egg).

Explanation

Wooden door and wooden frame expand during rainy season. On expansion, the door and its frame get misaligned. Hence, doors made of wood are difficult to open or close during the rainy season. Imbibition is a special type of diffusion that takes place when water is absorbed by solids-colloids causing an increase in volume. Examples include the absorption of water by seeds and dry wood. If it were not for the pressure due to imbibition, seedlings would not be able to emerge from soil.

Explanation

Gravity of the planetary body is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

Flat is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

Meat is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

Adrenal gland is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

All Electrostatic Copiers work under the premise that a charge of electricity is placed on an Image Drum which has the ability to retain the electric charge much like a capacitor holds its charge but with the ability to hold or release the charge depending on how much light and darkness is applied to the Image Drum. A photocopier (also known as a copier or copy machine) is a machine that makes paper copies of documents and other visual images quickly and cheaply. Most current photocopiers use a technology called xerography, a dry process using heat. Copiers can also use other technologies such as ink jet, but xerography is standard for office copying.

Explanation

Starch and sugar is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

Nitrous oxide is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.