Biology · Nutrition
Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.
Five words are shown below:
Labium, Maxillae, Labrum, Mandibles and Antennae
These words can be used in the spaces P, Q, R, S, and T to complete the sentence below.
Cockroaches are omnivorous and can eat any kind of organic matter. They search for their food by their ..P.. Their digestive system is tubular, having a straight slightly coiled digestive tube opening at both the ends. Hence, the digestive system is complete. The mouth lies at the base of the pre-oral cavity which is bounded by the mouth parts, ..Q.. (upper lip), ..R.. (lower lip), mandibles, and maxillae. The ..S.. pick up and bring food to the ..T.. for mastication.
- A
Option A
- B
Option B
- C
Option C
- D
Option D
Roaches use their antennae to locate food and estimate the distance and height of any obstacles in front of them. The labrum is also known as the upper lip. It consists of a flattened cuticle and helps to hold the food in the correct position when the cockroach feeds. The labium is often called an insect's lower lip. The labium is positioned towards the back of the head and helps hold food in place when the insect feeds. Maxillae are used to hold and manipulate food so that it can be chewed or sliced by the mandibles. The function of mandibles is to grasp, crush, or cut the food (mastication means to grind or crush (food) with or as if with the teeth). Using this information, the only correct option is option B.
The gaps can be filled as follows:
P - Antennae
Q - Labrum
R - Labium
S - Maxillae
T - Mandible
In option A, all these options are mismatched.
The gaps can be filled as follows:
P - Antennae
Q - Labrum
R - Labium
S - Maxillae
T - Mandible
All these options are matched, making B the right option.
The gaps can be filled as follows:
P - Antennae
Q - Labrum
R - Labium
S - Maxillae
T - Mandible
These options are mismatched, making C the wrong option.
The gaps can be filled as follows:
P - Antennae
Q - Labrum
R - Labium
S - Maxillae
T - Mandible
Options are mismatched, making it the wrong option.
Tagged under Biology · Nutrition · 2016