Recruitment is the increase in the number of motor units that are stimulated to produce a contraction with greater tension. Is it possible for cardiac muscle tissue to exhibit recruitment?

a. Yes, because cardiac muscle tissue has intercalated discs that recruit more motor units as the muscle increases contractions.

b. Yes, because cardiac muscle tissue must recruit more muscle cells as the heart increases contractions during exercise.

c. No, because cardiac muscle tissue has striations and increase tension without needing recruitment.

d. No, because cardiac muscle tissue has intercalated discs that allow the entire muscle to contract together, leaving nothing to recruit.

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers

the species living around the vents are especially good at dispersal.  

deep-sea vent originates on the floor of the ocean when seawater circulates through hot volcanic rocks, usually situated where the new oceanic crust is being produced.  

biological dispersal refers to the movement of species from their location of birth to their site of breeding, or from breeding site to another. similarly, the oceanic dispersal refers to the movement of the species from one land mass to another by sea crossing.