-
This is biological inheritance.
Frogs, belonging to the frog family amphibians, adults have no tails, eggs are laid in water, hatched into tadpoles, breathe with gills, and after mutation, adults mainly breathe with lungs, and also use ** breathing. The upper jaw has teeth, usually vomer teeth. shoulder girdle fixed thoracic type, vertebral body uneven type, recommended vertebral transverse process columnar; There is no intermediated cartilage between the two bone nodes at the end of the toes.
The tympanic membrane is distinctly hidden under the skin,** smooth or with wart grains. The tongue is generally oblong, and the posterior end is mostly notched.
The frog body can be divided into 3 parts: head, trunk, and limbs. Frogs have four toes on their front feet and five toes on their hind feet, as well as webbed. On either side of the frog's head are two small bags that bulge slightly.
That's its eardrum, through which the frog can hear sounds. The frog's back is green, smooth, soft, and patterned, and its belly is white. You can hide it in the grass, make it easier to catch pests, and you can also protect yourself.
It's also helps it breathe. Its air sacs are only found by male frogs. Frogs prey on their tongues, which have mucus on their tongues.
The frog has a flattened, slightly triangular head and a slightly pointed snout. The mouth is broad, transversely lobed, and consists of an upper and lower jaw. The dorsal aspect of the maxillary has 1 outer nostril at the anterior end of the outer nostril with a nasal flap.
The eyes are large and prominent, born on the left and right sides of the head, with upper and lower eyelids; The inner side of the lower eyelid has a semi-transparent transient membrane. When the eyelids are closed, there is a round eardrum behind each eye. There is a light brown membranous fold behind the mouth corner of the male frog as a vocal sac, which bulges into a bubble when chirping.
The tympanic membrane is followed by the trunk. The trunk of the frog is short and wide, and there is a small hole on the dorsal side between the legs at the back end of the trunk, which is the cloaca foramen.
The forelimbs are short and consist of 5 parts: upper arm, forearm, wrist, palm, and fingers. 4 fingers, no webbing between fingers. The hindlimbs are long and well-developed, and are divided into 5 parts: femoral, tibial, tarsus, metatarsus, and toes. 5 toes, webbed between the toes. There is a stiffer keratinized distance on the inside of the first toe.
The nerve cells of the frog retina are divided into five categories, one only responds to color, and the other four only responds to a certain feature of the moving target, and can transmit the decomposed feature signal to the visual center of the brain, the optic parietal cover. There are four layers of nerve cells on the optic parietal cover, the first of which responds to the contrast of the moving target; The second layer extracts the convex edge of the target; The third layer only sees the perimeter of the target; The fourth layer is only concerned with the light and dark changes of the target's dark leading edge. These four layers of features are like drawings on four sheets of transparent paper, stacked on top of each other to form a complete image.
As a result, the frog can immediately recognize its favorite flies and moths among the various shapes of small animals that fly rapidly, and will not react to other things that are flying or stationary.
The smallest frog is only 5 centimeters, which is about the length of a person's thumb, and the largest is 30 centimeters (more than a foot long), with a short and broad body and strong hind limbs. The pupils are all horizontal, smooth, the tip of the tongue is bifurcated, the tongue follows the front of the mouth, and it is long back into the mouth upside down, and it can suddenly turn out to catch insects. There are three eyelids, one of which is clear and used to protect the eyes in water, and the other two upper and lower eyelids are ordinary.
There are two vocal sacs on either side of the head that can resonate and amplify the call. Smaller breeds have a higher frequency of calls.
-
Frog eggs belong to foam-type egg masses, which look like a round steamed bun, dry on the outside and wet on the inside, moisturizing and protective. The outer bread of the egg has a transparent glial membrane that looks like a dumpling, which is produced by the glands of the fallopian tubes. The glial membrane swells when exposed to water and has the function of protecting the egg grain.
The eggs are generally black and white, and the black part is facing upward, which is called the animal pole, which can help absorb heat and promote development; The white part is called the plant pole and contains the yolk which is heavier and more downward, and the yolk provides the nutrients needed for embryonic development.
-
Maybe it has something to do with its living environment.
-
Frog eggs, because he is slowly growing into small tadpoles.
-
Because it's nature's choice.
-
Summary. Hello dear, frog eggs are approximately round oval, the outside of the eggs have an outer coat, that is, a transparent glial membrane, which expands when exposed to water, and is connected to each other to form a large egg mass; The glial membrane has the effect of protecting the egg and can make the egg have better development conditions. There is also a secretory vesicle below the zona pellucida (cortex) of the egg, and the release of cortical granules during fertilization can cause structural changes in the zona pellucida by way of efflux.
The frog eggs are transparent, with a sticky thick solution that encapsulates a black nucleus, and when the eggs are clumped, the cuticle prevents the eggs from being swallowed by the animal.
Hello dear, frog eggs are approximately round oval, the outside of the eggs have an outer coat, that is, a transparent glial membrane, which expands when exposed to water, and is connected to each other to form a large egg mass; The glial membrane has the effect of protecting the egg and can make the egg have better development conditions. There is also a secretory vesicle below the zona pellucida (cortex) of the egg, and the release of cortical granules during fertilization can cause structural changes in the zona pellucida by way of efflux. The frog eggs are transparent, with a highly coarse viscous thick solution encapsulating a black nucleus, and when the eggs are glued into large balls, the cuticular membrane can prevent the frog eggs from being swallowed by premature collapse animals.
The picture above is a frog egg.
This is the <> you caught
Hello dear, there are no frog eggs now, I found it for you**.
I'll give you a picture of only looking for frog eggs, so that you can intuitively understand what shape frog eggs are.
Frogs lay eggs in mid to late April each year.
-
A kind of frog in the burrow is white, it can't be said to be white, it is a little transparent, it is called a transparent frog.
Generally speaking, the body of the glass frog is green, most of the glass frogs are slightly transparent, only a few are transparent, and people can even see their internal organs through **.
Few people can spot glass frogs because they are small, usually only two or three centimeters long, and their body color is similar to that of rainforests, and they prefer to live in the depths of rainforests that are inaccessible. These frogs have been mistaken for tree frogs, but they are in fact significantly different from tree frogs in that their eyes look forward and tree frogs look sideways.
-
A kind of frog in the cave is white, and it can't be said to be white, it's a little transparent, it's not appropriate to call it a frog, a transparent frog.
Transparent frogs belong to the family of amphibian species, the family of centrolenidae. Transparent frog is a peculiar shape of frog, living in Venezuela, most transparent frogs have a lime green body color, and their abdomen** are transparent, so their heart, liver and digestive tract can be seen from the transparent **, also known as glass frog or crystal frog.
-
I have seen in man and nature that a kind of frog in a cave is white, and it can't be said to be white, it's a little transparent, it's not appropriate to call it a frog, a transparent frog.
-
First, the spawning time is different for potatoes.
Toads lay eggs in early April;
The frog spawning period is from late April to early May.
Second, the shape of the egg is different.
The eggs of the toad are "band-shaped", like a continuous long linear band, and the eggs in the band are arranged in two rows, like a string of beads, transparent with black particles.
The eggs of frogs are "green balls" with larger eggs and hatched tadpoles larger than forest frogs. The eggs of the small toad are similar to those of a frog, although they are also bulbous-shaped, but it is a "small pile" of eggs formed by a few or dozens of eggs, and the tadpoles that hatch are yellow in color and have a short tail.
-
Summary. Frog eggs can be placed on top of water sources and waterlogged blocks. The disappearance of the water underneath the frog eggs destroys the frog eggs.
Frog eggs can also be destroyed by falling blocks and protruding piston heads. Frog eggs cannot be pulled by sticky pistons. Frog eggs take about 3-10 minutes to hatch, and only hatch tadpoles if 1 block below them is a water source, running water, or a watery block.
Each block of frog eggs can hatch 2-5 tadpoles.
Frog eggs are not red.
Good good. Hello dear [Happy Burn], frog eggs are not red. The eggs of the frog are transparent in color and have a black nucleus on the surface.
A clear, viscous thickened solution encloses a black nucleus. This is what a frog egg looks like. Soybeans are the size, soft, transparent, with black spots in the middle, and the round leather shirt is arranged in blocks in the shape of a nucleus.
Toad eggs are arranged in bands.
Frog eggs can be placed on top of water buckets and waterlogged blocks. The disappearance of the water below the eggs of the frog will destroy the eggs. Frog eggs can also be destroyed by falling blocks and protruding piston heads.
Frog eggs cannot be pulled by sticky pistons. Frog eggs take about 3-10 minutes to hatch, and only hatch tadpoles if 1 block below them is a water source, running water, or a watery block. Each block of frog eggs can hatch 2-5 tadpoles.
-
Summary. Answer: Yes, frog egg masses are living organisms.
Frog egg masses are made up of frog eggs, which are made up of yolks and egg whites, and these yolks and egg whites are made up of the cells of frogs, so they are living beings. The formation of frog egg masses is caused by the fertilization process of the frog, which is produced by the union of male and female cells of the frog, and when these cells are combined, a fertilized egg is formed, and the fertilized egg develops into a frog egg mass. The process of frog egg mass development is a complex process that requires proper temperature and humidity conditions, as well as adequate oxygen and nutrients.
If these conditions are not met, the frog egg masses will not develop properly and may die.
Answer: Yes, frog egg masses are living organisms. Frog egg masses are made up of frog eggs, which are made up of yolks and egg whites, and these yolks and egg whites are made up of the cells of frogs, so they are living beings.
The formation of frog egg masses is caused by the process of receiving or covering sperm in the young frog, and the fertilization process is produced by the combination of male and female cells of the frog, which will form a fertilized egg, and the fertilized egg will develop into a frog egg mass. The process of frog egg mass development is a complex process that requires proper temperature and humidity conditions, as well as adequate oxygen and nutrients. If these conditions are not met, the frog egg masses will not develop properly and may die.
I'm still a little confused, can you be more detailed?
Yes, frog egg masses are living things. Frog egg scum masses are made up of eggs laid by frogs, which are made up of yolks, fats, and carbohydrates, which are made up of proteins, fats, and carbohydrates, while egg whites are made up of water and cell membranes. A frog egg mass is a type of fertilized egg that can develop into larvae and eventually into a full-fledged frog in the right environment.
The development of frog egg masses is very complex, and they need the right temperature and humidity conditions, as well as adequate oxygen and nutrients to develop properly. In addition, frog egg masses are also affected by viruses, bacteria, and other external factors that can cause them to die if these factors are not conducive to the development of frog egg masses. Thus, it can be said that frog egg masses are living organisms that are influenced by the external environment and can develop into full-fledged frogs.
In addition, frog egg masses can also be used to study biology, which can be used to study the development process of frogs, as well as the living habits of frogs.
-
Frogs are oviparous animals. Frogs belong to amphibians of the phylum Chordates, Tailless, Amphibians, and Frogidae, and are oviparous animals. Frog eggs are laid in water, fertilized in vitro, hatched into tadpoles, respirated with gills, and mutated in the later stage, mainly with lungs, but also with **.
The reproductive characteristics of frogs are dioecious, fertilized in water, and belong to oviparous animals. The breeding time is about mid to late April every year, and in the process of reproduction, frogs have a very special phenomenon - hugging pairs. If the male and female frogs are artificially separated, the female frog will not be able to release egg cells even during the frog's breeding period.
It can be seen that the biological significance of hugging pairs is mainly through hugging pairs, which can promote ovulation of female frogs. Generally, frogs lay eggs and fertilize in the water, and after the eggs hatch, they become tadpoles, live in the water, and then become young frogs and land on the shore. The egg-laying method of the tree frog is quite special, and the eggs produced by the spot-legged tree frog are like a cloud of white soap foam, and like a ball of cream, which adheres to the aquatic plants.
A fertilized female cockroach produces a large number of egg sheaths in her lifetime, and the American cockroach. >>>More
A word about frogs:
1. The frog sings - quacks. >>>More
The frog effect is when a frog is thrown into boiling water, and when it feels great pain, it kicks hard and jumps out of the water to get a chance to survive. When a frog is placed in a basin of warm water and gradually heated, the frog has gradually adapted to the pleasant temperature of the water, so when the temperature has risen to a certain level, the frog no longer has the strength to jump out of the water. So the frog was scalded to death in comfort. >>>More
Frogs belong to wild animals.
It is also a carnivore. >>>More
The frog is an amphibian, and his close relative is the toad. >>>More