a. cell shape- It is cell shape because not only are the other 3 nonsensical, the cytoskeleton is for the framework and movement of a cell.
Answer:
Phylum platyhelminthe
Explanation:
Although a few of the free living marine and terrestrial species are very beautiful, most species are not particularly attractive to the human mind. Their body is dorso-ventrally flattened.
They exhibit bilateral symmetry. They do not have a body cavity and are acoelomate. The movement of most platyhelminthes is using a wavelike motion that is controlled by longitudinal, circular, and oblique layers of muscle as they contract and relax simultaneously.
Answer:
c. environmental effects.
Explanation:
Based on the information provided within the question it can be said that this scenario is a perfect example of environmental effects. This term refers to the effect that external factors or conditions have on something. Which in this case since the flower color depends on the external conditions (aluminum in soil) then it is an example of environmental effects on the flowers gene expression.
Functions of cell surface Receptors .
most ligands responsible for cell-cell signaling ( including neurotransmitters, peptide, hormones, and growth factors) bind to receptors on the surface of their target cells.
Chromosomes and autosomal or somatic cells