Explanation

• Coronavirus is named due to its crown-like appearance.
• The virus has spike proteins on its surface.
• These spikes resemble a “crown” (corona in Latin).
• This structure helps the virus attach to host cells.

Last verified on 04-06-2026

Explanation

• After production, sperm cells are stored and matured in the epididymis.
• It is located on the testis.
• It helps sperm gain motility and fertilizing ability.
• It acts as a temporary storage site for sperm.

Last verified on 04-06-2026

Explanation

• Ascorbic Acid is commonly known as Vitamin C.
• It is essential for growth, repair, and maintenance of body tissues.
• Prevents scurvy, a disease caused by Vitamin C deficiency.

Additional information:

Sources of Vitamin C (5):

1. Orange
2. Lemon
3. Guava
4. Strawberry
5. Bell pepper

Functions:

• Antioxidant
• Collagen synthesis
• Strengthens immunity

Last verified on 19-01-2026

Explanation

• Methionine is the first amino acid in protein synthesis.
• It initiates the formation of the polypeptide chain.
• It is coded by the start codon AUG.
• It is essential for initiation of translation.

Last verified on 04-06-2026

Explanation

• Flukes and tapeworms are parasitic flatworms (Platyhelminthes).
• They have a highly developed reproductive system.
• This helps them produce large numbers of eggs for survival.
• Other body systems like digestion are reduced or absent.

Last verified on 04-06-2026

Explanation

• Fishes are the earliest formed vertebrates in evolution.
• They belong to the phylum Chordata.
• Chordates are characterized by a notochord and dorsal nerve cord.
• Fishes represent the first major successful vertebrate group.

Last verified on 04-06-2026

Explanation

• Mesoglea in Hydra is a non-cellular layer.
• It lies between the epidermis and gastrodermis.
• It mainly acts as a supporting and elastic layer.
• It does not contain true cells.

Last verified on 04-06-2026

Explanation

• Turner’s syndrome is a monosomic condition (2N − 1).
• It occurs when one X chromosome is missing in females.
• The karyotype is 45, X instead of 46 chromosomes.
• It leads to developmental and reproductive abnormalities.

Last verified on 04-06-2026

Explanation

• “Assess” means to evaluate or judge something carefully.
• In testing, teachers evaluate students’ work.
• It is the most appropriate word for formal examination feedback.
• It implies checking quality, performance, or understanding.

Last verified on 04-06-2026

Explanation

• “Because of” is used before a noun phrase.
• The sentence explains the reason for unknown dinosaur color.
• No skin samples survived, so color cannot be known.

Last verified on 04-06-2026