The morphological structure of locusts favors their ability to live in grasses

1) Organisms must adapt to the environment, the survival of the fittest, the unfit are eliminated, the locusts living in the green grass, its body color is usually green, for the protective color, is conducive to the predation of locusts and individual survival and the continuation of the race

2) The morphology of locusts and centipedes varies greatly, but their bodies are composed of many somites and are segmented, with exoskeletons on the body surface, which can play a role in protection and support, as well as reducing the loss of water in the body, and the antennae and feet are also segmented, so they all belong to arthropods

3) Locusts have three pairs of legs, all of which are born on the thorax The thorax has well-developed muscles attached to the exoskeleton, which are the forefoot, 2 middle feet and 3 hind feet, the feet are segmented, and the 3 hind feet are well developed and suitable for jumping

4) Locusts have two pairs of wings and are the locust's flight organs

1. The whole body of locusts is generally green, which helps to hide their whereabouts and confuse predators.

2. Long and powerful hind limbs, good for bouncing, able to walk freely on the grass.

3. Wings, although only a short flight, can quickly escape from predators.

The relationship between the morphological structure of the locust and its living environment is as follows: the locust has an exoskeleton on the body surface, which supports and protects the soft internal organs, reduces the loss of water in the body, and adapts to the dry land environment; a pair of compound eyes, with visual function, three monocular can feel the intensity of light; Three pairs of legs can crawl and jump, and two pairs of wings can fly after three instars. Touch is felt by locusts with antennae on the head, tentacles, tail whiskers on the abdomen, and receptors on the legs.

The taste apparatus is inside the mouthparts, and there are olfactory organs on the antennae. There is a tympanic membrane on either side of the first abdominal segment, or at the base of the tibial segment of the forefoot, which is responsible for hearing. The compound eye is responsible for vision, and the locust monocular is responsible for light sensitivity.

The hind leg segments are thick and suitable for jumping. In addition to antennae, the head also has a pair of compound eyes, which are the main visual organs. There are also 3 monoculars, which can only be sensitized.

There is a mouthpart under the head, which is the feeding organ of the locust. The mouthparts of locusts are composed of an upper lip (1 piece), an upper jaw (1 pair), a tongue (1 piece), a lower jaw (1 pair), and a lower lip (1 piece). Its upper jaw is hard and suitable for chewing, so this kind of mouthpart is called chewing mouthparts, and the whole body is usually green, gray, brown or black-brown, with a large head and short antennae; The dorsal plate of the anterior thorax is stiff and extends to the left and right sides like a saddle, and the middle and hind thorax are healed and cannot be moved.

The feet are well developed, especially the muscles of the hind legs are strong and powerful, the exoskeleton is hard, the whole body is usually green, gray, brown or black-brown, the head is large, and the antennae are short; The dorsal plate of the anterior thorax is stiff and extends to the left and right sides like a saddle, and the middle and hind thorax are healed and cannot be moved. The feet are well developed, especially the muscles of the hind legs are strong and powerful, and the exoskeleton is hard. The body surface has a rigid exoskeleton, whose main role is to protect and support the soft internal organs and prevent the evaporation and loss of water in the body.

This is one of the characteristics of adapting to life on land. The exoskeleton cannot grow with the growth of the locust's body, so in the process of locust growth and development, there is a phenomenon of shedding the original exoskeleton, which is molting. There is 1 pair of wings on each of the mid-thorax and hind thorax of locusts

Forewings and hindwings. The forewings are elongated, leathery, covering the hindwings and playing a protective role; The hindwings are broad, membranous, and soft, often folded under the forewings, and are organs suitable for flight when flying. In the first to eighth segments of the locust's mid-thorax, posterior thorax and abdomen, you can see that there is a small hole on each side of the corresponding position, this small hole is called the valve, there are 10 pairs in total, and the body wall on the side of the body is slightly separated from the internal organs with a dissecting needle and forceps, and you can find a white, translucent filamentous tube, which is the trachea, and the air sac can be clearly seen.

Locusts breathe through their trachea, so they are more adapted to living on land. Oxygen is directly sent to cells in various tissues through valves, trachea and microtrachea for gas exchange, which is different from earthworms that need to circulate blood to complete gas exchange. One of the reasons why insects are highly adapted to terrestrial environments is because they have this special respiratory system.

Locusts exchange gas with the outside world through the trachea, and the valve is a gateway for gas to enter and exit, which is suitable for land life;

The locust also has two pairs of wings, the forewings are leathery, narrow, and protective, and the hindwings are soft and broad, suitable for flight;

The body surface has an exoskeleton that protects and supports as well as reduces the evaporation of water from the body, which is the main reason for the adaptation of arthropods to life on land.

Locusts adapt to life on land and in the air with the following characteristics:

The terrestrial climate is relatively dry, and in line with this, locusts have an exoskeleton, which has the effect of protecting and supporting the internal soft organs and preventing the evaporation of water in the body The body of the locust is divided into three parts: head, thorax, and abdomen, and the locomotor organs - wings and feet are born on the chest The chest has developed muscles, which are attached to the exoskeleton and pull the locomotor organs to complete a variety of movements such as jumping and flying, which is conducive to foraging and avoiding enemies Locusts have respiratory organs that can breathe in the air and are located inside the body - the trachea Locusts also have relatively developed sensory organs and nervous systems, which can respond to the changing environment in a timely manner The wings of locusts are fan-shaped structures suitable for flight, and the movement of this structure is caused by the contraction and relaxation of muscles, which can produce upward lift and forward momentum in the air; Compared with the size of its own body, it has the characteristics of lightness, thinness, and large surface area, which is conducive to generating flight power by fanning the air, so that locusts can fly freely.

Locusts adapt to life on land and in the air with the following characteristics:

Locusts have an exoskeleton that protects and supports the soft internal organs and prevents the evaporation of water from the body. The body of the locust is divided into three parts: the head, thorax, and abdomen, and the locomotor organs, wings and feet, are born on the chest. The chest has well-developed muscles that attach to the exoskeleton.

Locusts have the trachea, the breathing organ inside the body that can breathe in the air. Locusts also have relatively well-developed sensory organs and nervous systems, which can respond to changing environments in a timely manner. The wings of locusts are fan-shaped structures suitable for flight, and the movement of this structure is caused by the contraction and relaxation of muscles, which can produce upward lift and forward momentum in the air; Compared with the size of its own body, it has the characteristics of lightness, thinness, and large surface area, which is conducive to generating flight power by fanning the air, so that locusts can fly freely.

Locusts are insects of the family Locustidae, Orthoptera. Commonly known as "grasshoppers", there are many species, and there are more than 10,000 species in the world. It is found in tropical, temperate grasslands and deserts all over the world.

The mouthparts are hard, the forewings are narrow and tough, the hindwings are wide and soft, and they are good at flying, and the hind limbs are well developed and good at jumping. It mainly harms grasses and is an agricultural pest.

You can consider it from the aspects of body structure, eating habits, and reproductive characteristics, which can be found on the encyclopedia.

Solution: This question examines the morphological structure, physiological basis and development characteristics of locusts, and terrestrial animals generally have structures that prevent water evaporation in the body, such as scales, exoskeletons, etc., in order to adapt to the terrestrial environment

Most of the arthropods belong to terrestrial animals, due to the relatively dry environment and climate of the terrestrial environment, the body surface of arthropods has a hard exoskeleton, and its main role is to protect and support the soft organs inside, prevent the evaporation and loss of water in the body This is one of the characteristics of adapting to land life The body of the locust is divided into three parts: head, thorax and abdomen, and the chest has three pairs of feet, two pairs of wings, and a pair of compound eyes. Locusts rely on the trachea for gas exchange, and the valve is the gateway into the body, which is suitable for terrestrial life

Therefore, a review:

Test points for this question: Arthropods Main characteristics of locusts; Terrestrial animals and their characteristics adapted to their environment

Test Center Comments: Insects are the most abundant type of animals in the animal kingdom, and their characteristics should be mastered

Answer] D Answer Analysis] Test Question Analysis: Locusts.

It belongs to arthropods.

Arthropods have an exoskeleton that has a protective effect and also reduces the evaporation of water from the body; The respiratory organ of the locust is the trachea, and the locust's abdomen has many openings, which are valves, and the valves are connected to the trachea in the locust's body, which is the passage for gases to enter and exit the body; The thorax is the center of movement, with two pairs of wings and three pairs of feet; These are locusts adapted to terrestrial.

Features of life. The head is the sensory center, with a pair of compound eyes and three monoculars, which can quickly sense changes in the environment. Therefore, choose D

Test Center: This question examines the characteristics of locusts, and is intended to test the candidate's ability to understand the key points of the knowledge learned and grasp the internal connection between knowledge.

Locusts exchange gas with the outside world through the trachea, and the valve is a gateway for gas to enter and exit, which is suitable for land life;

The locust also has two pairs of wings, the forewings are leathery

1) Organisms must adapt to the environment, the survival of the fittest, the unfit are eliminated, the locusts living in the green grass, its body color is usually green, for the protective color, is conducive to the predation of locusts and individual survival and the continuation of the race

2) The morphology of locusts and centipedes varies greatly, but their bodies are composed of many somites and are segmented, with exoskeletons on the body surface, which can play a role in protection and support, as well as reducing the loss of water in the body, and the antennae and feet are also segmented, so they all belong to arthropods

3) Locusts have three pairs of legs, all of which are born on the thorax The thorax has well-developed muscles attached to the exoskeleton, which are the forefoot, 2 middle feet and 3 hind feet, the feet are segmented, and the 3 hind feet are well developed and suitable for jumping

4) Locusts have two pairs of wings and are the locust's flight organs

Therefore, the answer is: (1) predation;

2) arthropods; 3) Three;

4) Two