A protozoan that divides to form two daughter cells just like itself would be undergoing binary fission
Answer:
Molecular Biology of the Cell is the classic in-depth text reference in cell biology. By extracting fundamental concepts and meaning from this enormous and ever-growing field, the authors tell the story of cell biology, and create a coherent framework through which non-expert readers may approach the subject. Written in clear and concise language, and illustrated with original drawings, the book is enjoyable to read, and provides a sense of the excitement of modern biology. Molecular Biology of the Cell not only sets forth the current understanding of cell biology (updated as of Fall 2001), but also explores the intriguing implications and possibilities of that which remains unknown.
Explanation:
The answer is I, evolutionary phylogeny; It is based on the phylogeny of organisms which is determines the similarities and differences in their physical or genetic characteristics. A phylogenetic tree or evolutionary tree is used which shows the inferred evolutionary relationships among various biological species or other entities.
Answer:
Cell wall and plastid
Explanation:
The most important difference between plant cell and animal cell is that plant cell contain cell wall for mechanical strength and plastid to carry out photosynthesis(chloroplast). and storage(leuko plast).
But in case of animal cell cyto skeleton is present in place of cell wall and plastid is absent because animals generally does not carry out photosynthesis.
Answer:
option B) intracellular receptors are present only in target cells.
Explanation:
The cell membrane or plasma membrane is composed of phospholipids and thus hydrophobic in nature, this allows the lipid soluble signaling molecules to cross the membrane. The cell membrane of all cells consist of phospholipids thus hydrophobicity of each cell membrane allows lipid soluble signaling molecules to pass through the plasma membrane. The testosterone cross the membranes of all cells but affect only target cells because of intracellular recepters that are located in target cell. The binding of signaling molecules to recepter generates a response. Thus, option B is correct.
