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Bile secreted by liver,

Saliva is secreted by salivary gland,

Trypsin is secreted by pancreas,

Pepsin secreted by gastric chief cell.

Answer: Option A - Bile

5 main classes of vertebrates: Aves( birds) Reptiles: snakes, lizards Amphibians: Frog, salamenders Fishes: both classes chondrichythes &Osteochythes Mammals

Blood clots are not formed inside the body majorly because of two factors; 1. Presence of the natural anticoagulant of the body i.e, Heparin. They interrupts the clotting cascade reaction as they are inhibit factor Xa and conversion of thrombin from prothrombin. 2. In normal condition RBC is already conjugated with oxygen which in suppress the action of fibrinogen.

Stomata present in Xerophytic plant which closed in day time and opens in night time,whereas,in Hydrophytic plants stomata is generally absent under water but present on the leaves which are exposed to air

Herbivores have teeth that are highly specialized for eating plants. Because plant matter is often difficult to break down, the molars of herbivores are wider and flatter, designed to grind food, and aid in digestion. Herbivore incisors are sharp for tearing plants, but they may not be present on both the upper and lower jaw. White tail deer are a perfect example of an herbivore that has only lower incisors and a rigid upper jaw that assists in the tearing of plants. Many animals, such as horses and cows, have jaws that are capable of moving sideways. Elephants are herbivores, and their incisors are unlike those found in other animals. Odd as it may sound, a tusk is actually a tooth, an incisor, that has evolved into a different type of tool, often used for defense.

Carnivores have a set of teeth that are very different from herbivores. That makes sense, because they also have a different diet. A carnivore will use its teeth to kill a prey item before eating it. The sharp incisors and pointed canine teeth are perfectly designed for both incapacitating and eating a meal. A canine tooth can be easily identified, as it is the longer, pointed tooth located on either side of the incisors. The molars are fewer in number than other animals may have, mainly because so much of the work is done by the teeth in the front of the mouth. While the presence of canine teeth does not guarantee that an animal is a carnivore, it is an indicator that meat is some part of the diet.

 Transpiration pull refers to the suction, force, or pull that draws water up through a plant. It is a biological process where the water molecules and ions are absorbed up from the roots, and then evaporation occurs within the leaves, spreading water throughout the plant.

Adherens Junction. The adherens junction (AJ) initiates and maintains cell–cell adhesion, regulates the organization of the underlying actin cytoskeleton, and establishes a hub for cell signaling and regulation of gene transcription.

Biogas is a mixture of methane and carbon dioxide produced by the decomposition of plant and animal waste and it is used as fuel.

Biogas is a type of biofuel naturally produced from the decomposition of organic matter, like food scraps and animal waste, in the absence of oxygen. It is a renewable source of energy comprising of mostly Methane (about 75%) and carbon dioxide too.

The chromosome acts a bearer of heredity units and thus coined as heredity vehicle.