Sponges have specialized cells and an endoskeleton, but they lack tissues and body symmetry. ... They include jellyfish and corals, both of which have radial symmetry. All cnidarians have nematocysts, and many are bioluminescent. They may exist in medusa and/or polyp form.
The correct answer is...Once the enzyme binds to the specific substrate molecule, subtle structure changes occur in the active site, which are reverted when the reaction is over.
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I believe he is looking for an allele
An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosomes. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
Answer:
En la sucesión primaria la roca recién formada o recién expuesta es colonizada por primera vez por seres vivos.
En la sucesión secundaria, un área anteriormente ocupada por seres vivos se ve alterada o afectada, y luego se vuelve a colonizar después de la perturbación.
Explanation:
