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1.Amoeba reproduces asexually by the process called binary fission. Binary fission occurs in single- celled organisms belonging to Kingdom Monera, and Protista (Amoeba and paramecium). In this process, the parent organism divides into two halves, each half forming an independent daughter organism.
Vegetative propagation is any form of asexual reproduction occurring in plants in which a new plant grows from a parent plant.
Vegetative propagation from Root :
Some plant roots develop adventitious buds. These buds grow and form and new plants under the right condition. These sprouts can be separated from the parent plant and when planted in other areas new plants are formed. Example- Sweet potato
Vegetative propagation by leaf :
Plants like Bryophyllium, Begonia etc have adventitious buds coming out from the notches of the leaves. These buds develop into new plants.
(b) It is used in a growing plant which plant's seed can not be formed or very few seeds are produced such as Orange, Banana, Pineapple.
(c) In hydra, first, a bud develops and after that, it divides the cell and nucleus. Then bud develops into tiny individuals and detaches from the parent body.
3.The placenta is an organ that develops in your uterus during pregnancy. This structure provides oxygen and nutrients to your growing baby and removes waste products from your baby's blood. The placenta attaches to the wall of your uterus, and your baby's umbilical cord arises from it. The organ is usually attached to the top, side, front or back of the uterus. In rare cases, the placenta might attach in the lower area of the uterus. When this happens, it's called a low-lying placenta (placenta previa)
4.At the most basic level, pollination is the way plants achieve fertilization and genetic diversity. Pollination process occurs when pollen grains from the male part of one flower (anther) are transferred to the female part (stigma) of another flower. Once pollination occurs, the fertilized flowers produce seeds, which enable the associated plant to reproduce and/or form fruit.
You will notice that we didn't specifically mention bees. Pollination can occur through many mechanisms, including some without the assistance of another living thing. Pollination through wind is an example.
However, living pollinators such as bees play a huge and valuable role in pollination across the globe. Let's drill down on how.
Benefits to Humans
Pollination provides many benefits to humans, with the most obvious being the abundance of food.
Corn is an example of a crop that needs wind pollination, which means it can thrive without the help of bees. By comparison, peppers and tomatoes are examples of plants that require pollination from insects.
In addition, the food farmers feed to their livestock requires pollination. A lack of pollination therefore even impacts, indirectly, the availability of meat and can result in a limited supply of vegetables, fruits, and nuts
Explanation:
your questions are cropped in picture. so i can't answer other ones..
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