Biology MCQs

Notes:
The chorion, being the outermost membrane surrounding a developing embryo, plays a pivotal role in facilitating exchange between the embryo and its environment. It forms part of the fetal membranes that include the amnion, yolk sac, and allantois, nestled below the amniotic sac and in connection with the maternal tissue. The placenta, though not an option here, would still be a correct answer as it is a temporary organ developed during gestation to nourish and oxygenize the developing fetus while eliminating waste products. Both the chorion and the placenta are indispensable for substance exchange between the fetus and mother during gestation.

Notes:
Arthropoda is the largest phylum of animal kingdom because around 2/3rd of all the named species on Earth belong to this phylum.
Ants, mosquitoes, flies, cockroaches, shrimp, crabs, spiders, scorpions etc. are examples of arthropods. There are three main classes of arthropods as follows:

• Insects: This includes mosquitoes, cockroaches, ants, flies, bees, moths, grasshoppers, beetles and butterflies
• Crustaceans: This includes crabs, lobsters, shrimp and barnacles
• Arachnids: This includes scorpions, spiders and mites

Further, a few other classes are onychophorans (velvet worms), diplopods (millipedes) and chilopods (centipedes).

Notes:
The zebrafish is a freshwater fish belonging to the minnow family. It is native to South Asia, it is a popular aquarium fish, frequently sold under the trade name zebra danio. It belongs to India and Sri Lanka.

Notes:
The pylorus is the furthest part of the stomach that connects to the duodenum. It is divided into two parts, the antrum and the pyloric canal. The antrum connects to the body of the stomach, and the pyloric canal connects to the duodenum.

Notes:
Hemodialysis is a procedure where a dialysis machine and a special filter called an artificial kidney, or a dialyzer, are used to clean your blood. It works on the principles of Diffusion & osmosis.

Notes:
Cardamom (Botanical name: Elettaria cardamomum) is called the Queen of Spices because of its rich aroma and many uses as a medicine and as a flavoring in food and drink.

Notes:
Photophobia is not a fear. It is excessive sensitivity to light and the aversion to sunlight or well-lit places,
Claustrophobia is fear of confined places,
Algophobia is fear of pain,
Anthophobia is fear of flowers,

Notes:
Seismonastic Movement is caused by the mechanical stimuli like shock, touch, fast moving wind, etc. Mimosa pudica is a perennial herb which is also known as the touch me not plant or the sensitive plant, is well-known for closing its leaves (or folding its leaves inwards) when touched.

Notes:
The human vertebral column is made of vertebrae that collectively protect the spinal cord and support the entire skeletal framework of the body. The human body has a total of 33 vertebrae. These consist of 7 cervical vertebrae in the neck, 12 thoracic vertebrae in the upper back, 5 lumbar vertebrae in the lower back, 5 sacral vertebrae in the pelvis, and 4 coccygeal vertebrae in the tailbone. These vertebrae are essential for providing support and flexibility to the spine.

Notes:
Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells of almost all vertebrates as well as the tissues of some invertebrates. Haemoglobin in the blood carries oxygen from the lungs or gills to the rest of the body.