Which one of the following belongs to the family Muscidae?

NEET-2021 [The-living-World] [class-xi ]

• Fire fly
• Grasshopper
• Cockroach
• House fly
Correct Option: D  [ House fly ]

Remark:

Match List-I with List-II.

NEET-2021 [Animal-Kingdom] [class-xi ]

• A-IV, B-III, C-I, D-II
• A-III, B-IV, C-I, D-II
• A-III, B-IV, C-II, D-I
• A-IV, B-I, C-II, D-III
Correct Option: C  [ A-III, B-IV, C-II, D-I ]

Remark:

Which one of the following organisms bears hollow and pneumatic long bones?

NEET-2021 [Animal-Kingdom] [class-xi ]

• Neophron
• Hemidactylus
• Macropus
• Ornithorhynchus
Correct Option: A  [ Neophron ]

Remark:

Match List-I with List-II.

NEET-2021 [Animal-Kingdom] [class-xi ]

• A-II, B-III, C-I, D-IV
• A-IV, B-I, C-III, D-II
• A-II, B-III, C-IV, D-I
• A-I, B-IV, C-III, D-II
Correct Option: C  [ A-II, B-III, C-IV, D-I ]

Remark:

Read the following statements.
A. Metagenesis is observed in Helminths.
B. Echinoderms are triploblastic and coelomate animals.
C. Round worms have organ-system level of body organization.
D. Comb plates present in ctenophores help in digestion.
E. Water vascular system is characteristic of Echinoderms.
Choose the correct answer from the options given below.

NEET-2021 [Animal-Kingdom] [class-xi ]

• C, D and E are correct
• A, B and C are correct
• A, D and E are correct
• B, C and E are correct
Correct Option: D  [ B, C and E are correct ]

Remark:

Which of the following characteristics is incorrect with respect to cockroach?

NEET-2021 [Structural-Organisation-in-Animals] [class-xi ]

• A ring of gastric caeca is present at the junction of midgut and hind gut.
• Hypopharynx lies within the cavity enclosed by the mouth parts.
• In females, 7^th - 9^th sterna together form a genital pouch.
• 10^th abdominal segment in both sexes, bears a pair of anal cerci.
Correct Option: A  [ A ring of gastric caeca is present at the junction of midgut and hind gut. ]

Remark:

Which of the following statements wrongly represents the nature of smooth muscle?

NEET-2021 [Structural-Organisation-in-Animals] [class-xi ]

• These muscle have no striations
• They are involuntary muscles
• Communication among the cells is performed by intercalated discs
• These muscles are present in the wall of blood vessels
Correct Option: C  [ Communication among the cells is performed by intercalated discs ]

Remark:

The organelles that are included in the endomembrane system are:

NEET-2021 [cell-the-unit-of-life] [class-xi ]

• Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes
• Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles
• Golgi complex, Mitochondria, Ribosomes and Lysosomes
• Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes
Correct Option: B  [ Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles ]

Remark:

Identify the incorrect pair.

NEET-2021 [Biomolecules] [class-xi ]

• Alkaloids - Codeine
• Toxin - Abrin
• Lectins - Concanavalin A
• Drugs - Ricin
Correct Option: D  [ Drugs - Ricin ]

Remark:

The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G₁ phase is 8, what would be the number of chromosomes after S phase?

NEET-2021 [Cell-Cycle-and-Cell-Division] [class-xi ]

• 8
• 16
• 4
• 32
Correct Option: A  [ 8 ]

Remark: