Grasshopper Post Lab. Practical

The statement "Grasshoppers have no known enemies" is false. Grasshoppers have several natural enemies, including birds, spiders, frogs, and other insects. These predators feed on grasshoppers as a source of food, making them a known enemy of grasshoppers. Additionally, grasshoppers are also susceptible to parasitic wasps and diseases, further disproving the statement.

The eastern lubber grasshopper has three ocelli or simple eyes. Ocelli are small, simple eyes that are usually found in addition to the main compound eyes. They are typically less developed and have limited vision compared to compound eyes. In the case of the eastern lubber grasshopper, it has three ocelli, which are likely used to detect light and shadows in its surroundings.

Male grasshoppers attract females both acoustically and visually. This means that they use both sound and visual displays to attract female grasshoppers for mating purposes. Acoustically, male grasshoppers produce sounds by rubbing their wings or legs together, creating a distinctive chirping sound. This sound serves as a form of communication to attract females. Additionally, male grasshoppers may also use visual displays such as bright colors or elaborate body movements to catch the attention of females. Therefore, the statement "Male grasshoppers attract females both acoustically and visually" is true.

Bees do not belong to the order Orthoptera. Bees belong to the order Hymenoptera, which also includes ants and wasps. Orthoptera is the order that includes insects like crickets, grasshoppers, katydids, and locusts.

Stridulation refers to the ability of insects to produce sounds by rubbing certain body parts. It is a characteristic feature of this group of insects and is used for various purposes such as communication, attracting mates, and establishing territory. The sound is produced by the friction between specialized body parts, such as wings or legs, and is unique to each species. Stridulation is an important adaptation that allows insects to communicate and interact with their environment.

The correct answer is "dorsal" because the term "dorsal" refers to the back or upper surface of an organism. In the context of the abdomen, the dorsal surface would be the upper surface of the abdomen. Therefore, after inspecting the abdomen, the upper surface is referred to as the tergum.

The tympanum, or eardrum, is located on the thorax of the eastern lubber grasshopper. The thorax is the middle part of the insect's body, between the head and the abdomen. This is where the grasshopper's wings and legs are also attached. The placement of the tympanum on the thorax allows the grasshopper to detect sound vibrations and communicate with other grasshoppers.

A grasshopper can jump up to 20 times its body length. This is due to its powerful hind legs, which allow it to generate a lot of force and propel itself forward. The grasshopper uses this jumping ability to escape from predators, reach food sources, and navigate its environment efficiently.

The statement is false because the thoracic spiracles are not the openings to the excretory system. The thoracic spiracles are actually the openings in the thorax of insects that allow for the exchange of gases, specifically oxygen and carbon dioxide, during respiration. The excretory system, on the other hand, is responsible for eliminating waste products from the body.

The abdomen does not belong to the reproductive system. The reproductive system consists of organs directly involved in reproduction, such as the vagina, seminal receptacles, ovarian tubules, and ovipositor. The abdomen, on the other hand, is a part of the digestive system and does not play a direct role in reproduction.

The eastern lubber grasshopper does not have any large compound sagittal eyes.

The arolium is a specialized structure found on the jumping legs of grasshoppers that helps them grip surfaces while jumping. The eastern lubber grasshopper is a specific species of grasshopper, and it is known to have arolium on its jumping legs. Therefore, the statement is true.

The tympanum is not located between the jumping and walking legs of the eastern lubber grasshopper. The tympanum, which is the hearing organ of the grasshopper, is actually located on the sides of its abdomen, near the base of its wings.

The coxa is located near the walking leg of the eastern lubber grasshopper. The coxa is the proximal segment of the leg, connecting it to the body. It serves as a joint and attachment point for muscles, allowing the grasshopper to move its leg in a walking motion.

The hypopharynx is not located between the ligula and mandibles. The hypopharynx is actually located behind the larynx and above the esophagus.

Epiproct and cerus are structures found in the reproductive system of mature females only. These structures are not related to excretion or digestion, but rather play a role in the reproductive processes specific to mature female organisms.

The correct answer is Borealene II. Borealene II is a type of preservative that is used to preserve grasshoppers. It is commonly used in scientific research and collections to prevent decomposition and maintain the integrity of the specimen. Glycerol, alcohol, and formalin are also commonly used as preservatives, but in this case, Borealene II is the specific preservative mentioned.

Structure number 2 is pointing towards the mandible. The mandible is the lower jawbone in vertebrates, which is responsible for movements of the mouth and chewing.

The phrase "Tapered abdomen ends" best describes the reproduction organs of a male eastern lubber grasshopper. This suggests that the abdomen of the male grasshopper narrows towards the ends, indicating the presence of specialized structures for reproduction.

The correct answer is Proventriculus. The proventriculus is the anatomical name for the eastern lubber grasshopper gizzard. The proventriculus is a specialized part of the digestive system found in insects, including grasshoppers. It is located between the esophagus and the midgut and functions to grind food particles before they enter the midgut for further digestion and absorption.

The correct answer is Sternum. The ventral surface of the eastern lubber grasshopper is called the sternum. The sternum is a plate-like structure located on the underside of the grasshopper's body, specifically on its abdomen. It serves as a protective covering for the grasshopper's internal organs and provides support for the insect's body.

Eastern lubber grasshoppers have several enemies that prey on them. Beetles, birds, mice, spiders, snakes, and flies are all known to feed on these grasshoppers. These predators play an important role in controlling the population of the grasshoppers and maintaining the balance in the ecosystem.

The correct answer is "Sclerites". Sclerites are fused plates that make up the head capsule of an insect. They provide protection and support for the insect's head.

The thoracic spiracles are the openings to the tracheal system, which allows direct gas exchange with the tissue. This means that oxygen can enter the body through the spiracles and be transported directly to the cells for respiration, without the need for a separate respiratory system like lungs or gills. The tracheal system consists of a network of tubes called tracheae that branch throughout the body, delivering oxygen to all the tissues and removing carbon dioxide waste. Therefore, the correct answer is Tracheal.

The correct answer is Romalea guttata and Romalea microptera. The question asks for the genus species of grasshoppers that you might have dissected. The genus species names given are Romalea lepidoperata, Romalea guttata, Romalea microptera, Romalea macroptera, and Romalea orthroptera. Out of these options, Romalea guttata and Romalea microptera are the only ones that are valid genus species names of grasshoppers. Therefore, these are the two options that you might have dissected.

The salivary glands are located ventral to the gastric caeca. This means that they are positioned below or in front of the gastric caeca.

The grasshopper's body is divided into three main segments: the head, thorax, and abdomen. The correct order of these segments from inferior (lower) to superior (upper) is abdomen, thorax, and head. The abdomen is the posterior segment, followed by the thorax in the middle, and the head is the most superior segment located at the anterior end of the body.

The correct answer is Galea : Lacina : Stipes. The grasshoppers' mouth parts are composed of three structures - the galea, lacina, and stipes. The galea is a large, outer structure that helps in chewing and manipulating food. The lacina is a smaller structure located inside the galea, which also aids in chewing. The stipes is a connecting structure that attaches the galea and lacina to the grasshopper's head. Together, these three structures form the mouth parts of grasshoppers.

After placing the eastern lubber grasshopper on its dorsal side and cutting through the exoskeleton, you observed the trachea, which looks like a mass of branch silvery tubes. The trachea is a part of the grasshopper's respiratory system and is responsible for carrying oxygen to different parts of its body.

The patella is the correct answer because it is a small, semilunar-shaped bone found in the grasshopper's leg. It acts as a storage site for energy, which is used for jumping. The patella works in conjunction with the other leg segments, such as the femur and tibia, to provide the necessary force and power for the grasshopper's impressive jumps.