Question

skeleton is totally absent in
a)sponges
b)star fish
c)fish
d)ameoba​

Answer 1

Answer:Amoeba. because it is a unicellular cell and has only the cell contents such as nucleus, mitochondria, golgi apparatus etc. but no skeleton. The rest organisms in the options have skeleton.

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Answer 2

Answer:

Explanation:

Amoeba:

Amoeba is a unicellular organism with shape-changing capabilities. Ponds, lakes, and slow-moving rivers are the typical habitats for them. These single-celled organisms can occasionally enter the human body and cause a variety of diseases.

Structure of Amoeba:

Pseudopodia, or blunt, finger-like projections made when the plasma membrane is forced outward or inside by the cytoplasm, are used for movement.

Its shape can quickly alter because there may be several pseudopodia present at once.

The cytoplasm, plasma membrane, and nucleus make up the majority of an amoeba's structure.

The outside ectoplasm and the inner endoplasm, two distinct layers of the cytoplasm, can be distinguished.

Skeleton is totally absent in Amoeba.

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