Zoology - 1 (B.Sc. Agriculture)

In a forest, most of the flying animals such as hummingbirds, owls, etc. can be found in the upper canopy.

Glycolysis is the first stage of cellular respiration in animal cells, occurring in the cytoplasm. It breaks down one glucose molecule into two pyruvate molecules, producing a net gain of 2 ATP and 2 NADH molecules. This anaerobic process precedes the Krebs cycle and electron transport system.

Metastasis refers to the spread of cancer cells from the primary tumor site to distant organs or tissues through the bloodstream or lymphatic system. This process is what distinguishes malignant cancers from benign tumors and is a major factor in cancer staging and treatment decisions.

 The correct option is 4.

The thymus gland is a pink-grey organ that lies underneath the top of the breast bone. In animals it is known as the sweetbreads. The role of the thymus gland is to process lymphocytes, which are white blood cells that travel the body through the bloodstream.

The offsprings get DNA from both mother and father. Hence, their traits are influenced by both the parents.

The dorsal chamber of the haemocoel is the pericardial sinus which is connected to the heart and gives oxygenated blood.
 

A lipase is an enzyme that catalyses the hydrolysis of fats (lipids). Lipases are a subclass of the esterases. Lipases perform essential roles in the digestion, transport and processing of dietary lipids (e.g. triglycerides, fats, oils) in most, if not all, living organisms.

 World Biodiversity Day is observed on December 29.

Ligaments and tendons are a part of the musculoskeletal system, with ligaments attaching bones to bones and tendons muscles to bones. They both are connective tissue.

The operculum is a bony flap that covers and protects the gills on each side of a fish's head. It plays a crucial role in the respiratory mechanism by opening and closing to allow water flow over the gills while preventing debris from entering.

Kinesin are plus end directed microtubule protein that uses a microtubule track along which it tends to walk. They are vital to movement of chromosomes during mitosis and are also responsible for shuttling membrane bound organelles (mitochondria, Golgi bodies, and vesicles within eukaryotic cells. 

Biosystematics is the study of diversity of organism and all their comparative and evolutionary relationships.

Hemoglobin is the iron-containing protein pigment in red blood cells that gives them their characteristic red color. It binds to oxygen in the lungs and transports it throughout the body. Plasma is the fluid component, while platelets are cell fragments involved in clotting.