Question

Male cockroach differs from female cockroach in having (a) antennae (b) labrum (c) maxillae (d) anal styles. 1

Short answer

Male cockroach differs from female cockroach in having anal styles.

Step-by-step solution

Understand the biological characteristics of cockroaches

Male and female cockroaches can be differentiated by examining their physical features and characteristics that are unique to each gender.

Identify the unique features

Antennae, labrum, and maxillae are not unique to either gender. Both male and female cockroaches possess these features as part of their anatomy. The key is to identify which of the listed features is distinct to males.

Determine the correct answer

Anal styles are appendages that are present in male cockroaches but absent in females. Therefore, the male cockroach differs from the female cockroach in having anal styles.

Key concepts

Cockroach Anatomy

Understanding the anatomy of cockroaches is key to distinguishing between male and female specimens. Generally, cockroaches display a flattened, oval body shape which allows them to squeeze into tight spaces. They have a hard exoskeleton that provides protection and support, segmented bodies that consist of a head, thorax, and abdomen, and six jointed legs that enable swift movement.

Key anatomical features include long antennae used for sensing their environment, a mouth region composed of parts such as the labrum and maxillae which aid in food processing, and wings that may or may not be used for flight. While both genders share most anatomical traits, there are subtle differences that aid in gender identification. One of these traits is the presence of 'anal styles', which is exclusive to males.

Biological Characteristics of Cockroaches

Diving deeper into the biological characteristics of cockroaches, we find that their resilience is rooted in their adaptable physiology and behavior. These creatures are notorious for their survival capabilities, thriving in environments ranging from tropical rainforests to urban areas.

Cockroaches are mostly nocturnal and will usually be seen foraging at night. They are omnivorous, meaning their diet consists of both plant and animal matter, which includes decaying organic material. This dietary flexibility contributes to their successful adaptation in various environments. Cockroaches also exhibit a rapid reproduction rate, which is another factor that makes them both resilient and difficult to control.

Anal Styles

Focusing on anal styles, these are external appendages found in male cockroaches at the end of their abdomen. They are paired structures adjacent to the cerci, functioning as important sensory organs. In addition to sensory roles, anal styles also play a part in the reproductive process.

From an educational standpoint, recognizing anal styles is critical when studying the sexual dimorphism in cockroaches. These appendages are not present in females, thus providing a clear and straightforward method for gender differentiation in educational settings and practical pest management.