Amoeba, Biology

Assignment Help:

Place a slide of Amoeba (common species is A. proteus) under tlie lnicroscope and focus it under low power (5x x 5x), and observe it carefully. Amoeba looks like an irregular colourless drop of gelatinous protoplasm.

i) Tlie body is covered by a thin elastic, semi-permeable membrane called 91 plasmalemma

ii) Under tlie plasmalemma, tlie protoplasm is clearly distinguished into an outer clear ectoplasm and an inner granular fluid-like endoplasm.

iii) Try to identify the anterior and the posterior ends of Amoeba. Tlie anterior elid is cliaracterised by a thick layer of ectoplasm (tlie hyaline cap), while the posterior end is modified in tlie form of a tail like region the uroid (The anterior end of amoeba is the one in which direction a pseudopodium is given out for progression).

iv) You will see some blunt, finger-like projections. These are tlie pseudopodia and are tlie extensions of the protoplasm. Pseudopodia help tlie Amoeba to move in tlie medium and also in capturing food.


Related Discussions:- Amoeba

Growth rate in animals, GROWTH RATE IN ANIMALS - Growth rate is differe...

GROWTH RATE IN ANIMALS - Growth rate is different at different periods of life. Growth period in human may be studied in 5 steps - (i) Prenatal - In gestation period fo

Hydra – metazoa, Hydra – Metazoa The animals of phyla Cnidaria and Cte...

Hydra – Metazoa The animals of phyla Cnidaria and Ctenophora are made up of only two germ layers: ectoderm which forms the outer covering of the animal and endoderm which is t

Define assessment of manganese status, Define Assessment of Manganese Statu...

Define Assessment of Manganese Status? The body Mn status has not been yet established by laboratory tests. Though the normal range of serum Mn concentration is found out to b

What are the cell types that form the phloem, What are the cell types that ...

What are the cell types that form the phloem? What are the main features of those cells? The major cells that form the phloem are the sieve elements and the companion cells. Th

Specific considerations and applied aspects in dentistry, Specific consider...

Specific considerations and applied aspects in dentistry The dental chair and delivery system. The chair should be smooth and seamless. The greatest potential for cross contami

What do the major organs of the digestive system do, What do the major orga...

What do the major organs of the digestive system do? They are salivary glands, teeth, tongue, gums, esophagus, stomach, small intestine, large intestine, pancreas, liver, and g

What happens when the cell membrane ruptures, Explain what happens when the...

Explain what happens when the cell membrane or plasma membrane ruptures or breaks down? Ans) When cell membrane ruptures Ions leek out and unless repaired in time the cell will

Blotting, Blotting  is the technique for detecting one RNA within the mixtu...

Blotting  is the technique for detecting one RNA within the mixture of RNAs (a Northern blot) or one type of the DNA within of a mixture of DNAs (a Southern blot). A blot can prove

Emulsion products, E m u l s io n products Ground meat products s...

E m u l s io n products Ground meat products such as sausages, patties and luncheon meats are emulsion based products and their quality depends upon the ability of lean m

Which are the heart chambers, Which are the heart chambers respectively whe...

Which are the heart chambers respectively where the entrance and the exit of blood occur? The heart chambers by which blood enters the heart are the atria. There are the right

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd