How do amoebas grow?

Answer 1

Amoeba is a protozoan animal that is unicellular microscopic and found in fresh and marine water. It is also a endoparasite. In amoeba only asexual reproduction takes place and is of three types. 1 Binary fission: takes place in favourable conditions( when enough food and adequate temprature is avialable) just like mitosis completed in half an hour. During binarry fission amoeba stops feeding pseudopodia contract, but not dissapear. Contractile vacoule goes to one daughter cell and in second new c.v. is formed. Cytoplasm content of daugher amoeba just after division is near about equal to parent amoeba. 2 By sporulation: not found in amoeba proteus but found in other species of amoeb. Takes place in unfavourable conditions. The cell form 500-600 chromatin granules which undergo sporulation in favourable conditions and 250-300 spores are relased which become amoeba. 3 By encystment:takes place under unfavourable conditions, about 500-600 amoeba are formed. RESPIRATION: amoeba is aerobic. Respiration system is absent. Respiration takes place by diffusion through general body surface. NUTRITION: It is holozoic, ingest food by phagocytosis Digestion is intracellular, takes place in food vacoule. Digestive enzyme released from lysosome. Trypsin and amylase are also found. EXCERETION: amoeba is ammonotelic but dicarbonyl urea crystals are also found. Exceretion takes place through general body surface.

Answer 2

As amoebas get older they increase in size. When big enough they spilt in half to create two daughter cells that are identical genetically to each other. This is called mitosis.

The process starts by having the nucleus of the cell, where the divide into two identical nuclei. The body of the amoeba then draws apart until it separates. Each cchunk has one of the new nuclei.

The new amoeba eat and grow until they spilt again.

This means that each amoeba you see today of any specific type is the same as all other amoeba of that type that ever were

Answer 3

Amoeba use binary fission as their sole method of reproduction. Binary fission simply means an entire organism dividing into two entire organisms. The concept of binary fission is similar to mitosis, but mitosis is dividing of a non-autonomous cell into two. For example, the cells in skin perform mitosis.

Answer 4

Well, it's not a very fancy process at all. Amoeba can die in several ways, and depending on the method of death will define its final resting state. Here are two main ones:

Starvation

Cellular processes cease due to lack of nutrition and the amoeba essentially becomes a bag of enzymes, some proteins and inactive genetic material, to be perhaps eaten by another organism or left to drift. It is interesting to note that during times of starvation, amoebas can seek out other amoebas which are genetically similar. They can then clump together to form multi-cellular organisms in which some amoebas will become spores which can be moved to other locations to find more food, or they can become stalks which provide some height for the spores to then spread out.

Hypertonic and hypotonic solutions

Hypertonic refers to solutions with too much solute (saline water), and hypotonic refers to solutions with too little solute (fresh water) compared to the inside of a ameoba. Like most cells, amoebae are adversely affected by excessive osmotic pressure (a result of passive diffusion) caused by extremely saline or dilute water.

* In salt water amoebae will try to prevent the influx of salt in saline water, resulting in a net loss of water as the cell becomes isotonic with the environment, causing the cell to shrink. If it shrinks too much, the ameoba cannot sustain itself internally and the result is a shrivelled bag of enzymes, some proteins and inactive genetic material. * Placed into fresh water, amoebae will also attempt to match the concentration of the surrounding water by taking in surrounding water, causing the cell to swell and sometimes burst. Upon bursting, the bits and pieces of ameoba internals drift out and leave the skin of the ameoba like a floating empty husk.

Answer 5

they kdlsajkfdjds then afterjsdja;kfjoi they die

Answer 6

An amoeba divides and produces two other small amoebas. Amoebas eat plant cells, bacteria, algae and microscopic metazoa and protozoa.

Answer 7

You would need a lot of medicens...like cream, or a spray...i would ask a doctor about this.

Answer 8

amoebas get large by relying on what they have around them to grow and then go into a sexual reproduction. They rely on what bacteria they can eat using their psuedopods.