If you do not have variations to be selected by natural or sexual selection on their superior abilities to survive and reproduce successfully then nothing can be naturally selected against the immediate environment.
Answer: Hydrophobic hormones
Explanation:
Hydrophobic hormones are able to diffuse through the membrane and interact with the intracellular receptor.
These hormones travels in the blood plasma which is bound to the plasma protein.
Example: Steroidal hormones are highly hydrophobic in nature.Steroids are sex hormones related to the maturity of the body.
Answer:
prokaryotic cells have no membrane bound organelles
Answer:
secrete a cytokine that triggers apoptosis
Explanation:
Cytotoxic T cells secrete granzymes and perforins when targeting cells. Additionally they secrete cytokines such as IFN-, TNF-α and TNF-β that act to activate macrophages and help kill infected cells.
If they have cell walls it will be hard for the material to get in and out of the cell resulting in cell death or damage
