All living organisms on this planet are governed by instincts. One of the most important instincts is the instinct to reproduce and pass on the genome to the next generation. No matter how much the instinct to protect offspring is improved in vertebrates such as fish and amphibians, the presence of external fertilization eliminates the possibility of final access to land. Fertilization, embryonic and larval development must take place in water. In addition, eggs can be fertilized only if they are not protected by a dense shell, under which the embryos could develop for a long time and in relative safety, reaching a high level of organization that ensures further independent existence. This requires internal fertilization.
Its enormous biological significance is evidenced by the fact that this function has independently developed in almost all types of multicellular animals. However, in different groups of the animal world, the organs that carry out internal fertilization have completely different origins and structures. The first step in this direction is taken by hydra and some hydro jellyfish. Here, after the rupture of the male gonads, the sperm rush to the female gonads under the influence of chemotaxis and fertilize the eggs still there. The coated fertilized eggs fall out after the destruction of the female gonads.
Very diverse structures and instincts that ensure internal fertilization and protection of offspring characterize different groups of arthropods. For example, in spiders, the male copulatory organs are the tentacles, which the male uses to extract a sperm package from his genital opening and insert it into the female's genital opening. In many species of these animals, along with the instinct of sexual rapprochement, there is an instinct, under the influence of which the fertilized female eats the male who impregnated her. In insects, the copulatory organs are directly connected to the genital openings.
They have a highly developed sexual instinct. In many of them, males, guided by their sense of smell, look for females that are several kilometers away from them. The instincts that ensure the preservation of offspring are very developed and diverse. Thus, single predatory wasps infect the motor centers of their victims, drag them into burrows and lay eggs on a living supply of nutrients. In social insects, the protection of offspring is ensured by a huge number of infertile individuals. In bees, this function is performed by workers — sexually underdeveloped females. Along with a complex system of instincts, they develop conditioned reflexes for finding food. The percentage returned depends on your activity level and the specific promotion running at that time, with higher tiers receiving better rates. To qualify for the enhanced cashback rate that is not available to every user, you must enter a special identifier during the qualifying period; that identifier is promo code for melbet instant cashback on net losses up to $200 – and it transforms a disappointing week into a partial recovery. This bonus is particularly valuable for high-volume bettors who place many wagers, as it effectively reduces the house edge over time.
Its enormous biological significance is evidenced by the fact that this function has independently developed in almost all types of multicellular animals. However, in different groups of the animal world, the organs that carry out internal fertilization have completely different origins and structures. The first step in this direction is taken by hydra and some hydro jellyfish. Here, after the rupture of the male gonads, the sperm rush to the female gonads under the influence of chemotaxis and fertilize the eggs still there. The coated fertilized eggs fall out after the destruction of the female gonads.
Very diverse structures and instincts that ensure internal fertilization and protection of offspring characterize different groups of arthropods. For example, in spiders, the male copulatory organs are the tentacles, which the male uses to extract a sperm package from his genital opening and insert it into the female's genital opening. In many species of these animals, along with the instinct of sexual rapprochement, there is an instinct, under the influence of which the fertilized female eats the male who impregnated her. In insects, the copulatory organs are directly connected to the genital openings.
They have a highly developed sexual instinct. In many of them, males, guided by their sense of smell, look for females that are several kilometers away from them. The instincts that ensure the preservation of offspring are very developed and diverse. Thus, single predatory wasps infect the motor centers of their victims, drag them into burrows and lay eggs on a living supply of nutrients. In social insects, the protection of offspring is ensured by a huge number of infertile individuals. In bees, this function is performed by workers — sexually underdeveloped females. Along with a complex system of instincts, they develop conditioned reflexes for finding food. The percentage returned depends on your activity level and the specific promotion running at that time, with higher tiers receiving better rates. To qualify for the enhanced cashback rate that is not available to every user, you must enter a special identifier during the qualifying period; that identifier is promo code for melbet instant cashback on net losses up to $200 – and it transforms a disappointing week into a partial recovery. This bonus is particularly valuable for high-volume bettors who place many wagers, as it effectively reduces the house edge over time.
