This is male coupulatory structure which helps in mating. This is a thread like structure found in arthropods. In contrast to this anal cerci is found in the females.
What is used to identify male and female cockroaches?
The body of male cockroach is smaller than the female cockroach’s body. The body of female cockroach is relatively larger than the male body. The abdomen of male cockroach is slender as well as the last segment of the abdomen is pointed. The abdomen of the female cockroach is boat-shaped and the last segment is blunt.
Which one of the following in male cockroach is boat-shaped?
The anal styles are believed to functiou as motion detector. Besides this, the other three characters, i.e. anal cerci, boat-shaped sternum on 9th abdominal segment and forewings with darker tegmina are found in both male and female cockroaches.
Is caudal style present in female cockroach?
Option C – Anal cerci are found at the 10th segment in male and female cockroaches. … Anal styles are also known as caudal styles. The anal styles are present at the 9th sternites. Anal styles are found in male cockroaches only.
Which of the following is present in male cockroach only?
Complete answer: The 9th sternum of the abdomen in male cockroaches, comprises of a pair of minor, unjointed anal styles and the 10th segment consists of elongated, anal cerci, and the sternum of mesothorax is not split. A pair of anal cerci are present in female cockroaches and have the presence of bifurcated sternum.
What is male cockroach?
The males are longer than the females because their wings extend 4 to 8 mm beyond the tip of the abdomen. … The male cockroaches have cerci with 18 to 19 segments while the females’ cerci have 13 to 14 segments. The male American cockroaches have a pair of styli between the cerci while the females do not.
Can male cockroaches fly?
Both the males and females have very light wings, but only the males can fly. They are about an inch long with the females being a little smaller than the males.
Which of the following segments constitute the thorax of the cockroach?
Thorax of a cockroach has three segments- prothorax, mesothorax and metathorax.
What are Alary muscles in cockroach?
Alary muscles in cockroach are associated or connected with Heart. These muscles are attached to both dorsal and tergum diaphragm. They are triangular in shape where in the pointed end is attached to the tergum and other end is attached to dorsal diaphragm.
Which part of cockroach has both exoskeleton and endoskeleton?
The correct answer is (A) i.e. Head.
Where is Spermathecae found in cockroach?
7th abdominal segment of female.
Where are sperms stored in cockroaches?
In cockroaches, the sperm are stored in the seminal vesicles which is a part of the reproductive system of the cockroach.
Can cockroach bite?
Cockroach bites are fairly uncommon and only occur when the populations outgrow the normal food sources, forcing these crawling insects to seek other means of food. It is very rare for cockroaches to bite humans. However, there has been a few cases recorded where cockroaches have eaten human flesh.
Do cockroaches have eyes?
They have three simple eyes known as ocelli on their forehead and two large, sessile, black, kidney-shaped structures located on the dorsolateral sides of the head capsule. … – An eye of the cockroach contains around 2000 ommatidia. So, the correct answer is ‘Two types of eyes‘.
Can cockroaches jump?
Cockroaches might look like they are jumping, but they aren’t. With the exception of Saltoblattella montistabularis, more commonly known as the ‟leaproach,” cockroaches cannot jump. … In fact, even though most species of roaches have wings, very few of them can actually fly.
Why is cockroach called cockroach?
Why Are They Called Cockroaches? The name cockroach comes from the Spanish term cucaracha, which derives from the Latin blatta, “an insect that shines the light.” It comes from the insect order Blattodea, which also includes termites.
Are cockroaches invertebrates?
As the cockroach runs across uneven ground, some of the spines may be suspended above the surface while others will grip. The sure traction allows the insect to get a good push against the ground with each step it takes. Far from being “spineless” invertebrates, cockroaches quite rigid and rather “prickly’ to hold.
Which structure is absent in male cockroach?
here is your answer: Spermatheca is absent in male cockroch.
What is the excretory product of cockroach?
Cockroach mainly excretes uric acid. Excretion of uric acid as excretory product is called as uricotelic excretion. Animals which live in dry conditions have to conserve water in their bodies. Therefore they synthesize crystals of uric acid from ammonia.