CATDOLL : CATDOLL:How many eggs can a fly lay in one nest?

1. How many eggs can a fly lay in one nest?

Flies lay 100-150 eggs each time, and these 100 eggs will become adult flies after ten days, so a fly can breed thousands of flies in its lifetime. A fly can lay eggs for the rest of its life after mating once, and a female fly can lay eggs 5-6 times in its lifetime. The life of a fly can be divided into four stages, starting from the mating and egg laying of adult flies, through the process of eggs-larvae (maggots)-pupa-adult flies, which only takes about 10 days and can be shortened when the temperature is high.

House flies lay about 100 eggs per batch, and a female house fly can lay 10-20 batches of eggs in its lifetime, with a total egg production of about 600-1000 eggs.

Flies have the physiological characteristic of laying eggs for life after mating once. A female fly can lay eggs 5-6 times in her lifetime, with about 100-150 eggs laid each time, and up to 300 eggs at most. It can reproduce 10-12 generations in a year.

2. Can a fly grow up in one day?

no

The entire life cycle of a fly is generally 16-35 days. The larval stage lasts 3-9 days (depending on the temperature), and the adult emerges 10-17 days after pupation.

After the adult flies fly out of the pupa, they begin to reproduce within a few hours, and the main purpose of the adult's existence is also reproduction. In the last stage of its life (about a month), it lays eggs 6-14 times. During this period, a female fly lays between 75-150 eggs at a time, laying 500-2000 eggs in a lifetime, and then begins its life cycle again and again.

3. Why is it easy for insects to grow on flesh after flies bite it?

Because flies lay eggs and reproduce on the flesh they bite.

Flies have strong reproductive capacity and a short life cycle. In summer, under suitable temperature and humidity conditions, they complete a generation every 7-9 days. It usually takes only 7 days for fly maggots to develop from eggs to adults. A female fly can lay eggs 6-8 times in its lifetime, and can lay about 250 eggs each time.

When we see a fly resting on a piece of food, it may be eating, but it may also be laying eggs and reproducing. The breeding ground for fly larvae requires a very small area. As long as the conditions are right, a small area can become a hotbed for thousands of larvae.

Flies lay eggs on the meat, which soon turn into maggots.

Because that's flies breeding on the meat.

4. What diseases should middle-aged and elderly people pay attention to prevent in winter?

Cold weather and the increase in allergens in food and air are important factors that make asthma more likely to occur. Therefore, we should pay close attention to the patient's living habits, carefully find out the allergens that may cause asthma, and try to avoid contact with allergens. Secondly, we should add clothes in time with the change of climate. We should prevent cold. We should also pay attention to strengthening nutrition, attach importance to physical exercise, and actively cooperate with treatment.

When stroke enters the late autumn, low temperature can reduce the elasticity of blood vessels on the body surface, increase peripheral resistance, excite the sympathetic nerves, increase the secretion of adrenal cortex hormones, thus causing small arteries to contract and blood pressure to rise, leading to rupture of cerebral blood vessels. Cold can also increase the concentration of blood fibrin, causing blood viscosity and leading to thrombosis. Therefore, it is necessary to pay attention to the treatment of primary diseases such as hypertension, diabetes, and coronary heart disease, and pay attention to premonitory symptoms. If you find sudden dizziness, severe headache, blurred vision, limb numbness, etc., you should go to the hospital for treatment in time to prevent accidents.

5. The junior high school biology graduation exam is coming up soon, and I have some urgent questions to answer.!~~

1. In the structure of chicken eggs, the egg cell is located in the embryonic disc;

Reason: The yolk is not the egg cell. In fact, if you pay attention to the yolk of a chicken, you will find that there is a small white dot on the yolk, about 1-2 mm in diameter. That is the embryonic disc, where the egg cell is located. The main function of the yolk is to provide sufficient nutrition for the development of the egg cell.

2. A woman is a carrier of albinism gene. The cells that may not contain the gene causing the disease are

C.Ovum

Other cells are somatic cells and carry all genes. Only egg cells come from meiosis and may carry normal genes. Of course, it is also possible that they may carry pathogenic genes, but it is just a possibility, accounting for 50% each.

3. Most insects living on islands frequently hit by storms are wingless, while a few have well-developed wings. Both have adapted to the local environment. This fact shows that:

C mutation is non-directional

Mutation is non-directional, only selection is directional. Only individuals that adapt to the environment can survive. Therefore, individuals that can withstand strong winds either do not fly or fly very strongly. Therefore, in many organisms, unadaptable individuals are eliminated, and the remaining ones are adaptable, which is why the phenomenon given in the question occurs.

4. There are three varieties of apples, A, B and C. Graft A onto B. After it survives, use C to pollinate it. The edible part of the resulting apple has similar characteristics to A.

Grafting is asexual reproduction, and maintaining the characteristics of the parents is the characteristic of asexual reproduction. The fruit has nothing to do with pollen or rootstock, but only with the scion.

5. Natural selection is achieved through

B. Struggle for survival

Natural selection is the phenomenon that the fittest survive in the struggle for survival, while the unfit are eliminated! That’s the concept.