Answer:
I can tell you now that its definitely not D., C, or E. However, I'd debate that it'd be either A. or B.
Me, I'd go with b, but it could be either a or b.
Altruism has NOTHING to do with bee's as it is the belief of putting yourself aside for the well-being of others, but in biology, it refers to behavior by an individual that increases the fitness of another individual while decreasing the fitness of the actor.
Hearing has NOTHING to do with the reproductive system.
Nothing is to too small to have functional ears.
D,E, and C don't make sense.
Explanation:
Answer:
Keratin serves important structural and protective functions, particularly in the epithelium. Some keratins have also been found to regulate key cellular activities, such as cell growth and protein synthesis
Answer:
two (a pair)
Explanation:
Centrioles are the pair of hollow cylinders that are located near the nucleus in the cytoplasm in a non-dividing cell. Two centrioles together make a centrosome. Centriole duplication occurs before cell division as the duplicated centrioles take part in the formation of the spindle apparatus. However, cytokinesis distributes one pair of centrioles to each daughter cell. Therefore, after cytokinesis, two centrioles are present in each daughter cell.
The charge on the protein is the sum of all positive charges and negative charges on the amino acids it contains. Proteins are composed of several amino acids that contains different functional groups. These groups may have positive, negative or neutral charges depending on the pH it is in.
A signal cascade is a series of chemical reactions which are triggered by a stimulus acting on a receptor that is then transduced to the intracellular space through second messengers. Finally, effector molecules receive the signal causing a cellular reaction to the initial stimulus. A signal cascade is very useful because it facilitates and accelerates the communication between cells that could be in different parts of a living organism. This communication is vital for cell processes in complex multicellular organisms.
