In biological terms, which of the following is an accurate description of the te

Question

In biological terms, which of the following is an accurate description of the term 'plasticity'. You may need to use outside sources to get a full understanding, but make sure this is in a biological context. The rigid role an organism plays in the ecosystem it evolved in. The ability of an organism to change its phenotype in response to changes in the environment. An organisms ability to utilize hydrocarbons to create biological structures. Which features of the phylum Platyhelminthes make them appear to be an early-branching group of bilaterians (though this phylogenetic placement is debated)? The simplest organisms with 3 tissue layers, bilateral symmetry and organs: they lack a coelom and lack an anus. The simplest organisms with 2 tissue layers, bilateral symmetry and organs: they have a coelom and an anus. The coplex organisms with 3 tissue layers, bilateral symmetry and lacking organs: they lack a coelom and have an anus.

Explanation / Answer

1.The ability of an organism to change its phenotype in response to change in the environment is refers as plasticity .it may defined as adaptation by organism which changes the morphology of an organism due to any stimuli in an environment.(2nd is the correct answer).

ans 2- platyhelminthes are bilaterally symmetrical, triploblastic (having 3- tissue layers) and acoelomates(means lack of coelom) animals with organ level of organisation.These are mostly endoparasite which absorbs nutrients from the host directly from their body surface, so it may having complex alimentry canal or may be absent and they lack an anus .(first option is the correct statement for platyhelminthes).

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