It's most likely a because plant,fish and turtles need water to survive nevermind just go for b lol :)
The correct answer is letter b. adrenaline secreted by the adrenal glands.
The heart pumps harder and blood pressure rises during a fight-or-flight response. This response is due to adrenaline secreted by the adrenal glands. Adrenaline is <span>a substance that is released in the body of a person who is feeling a strong emotion.</span>
Answer:
Explanation:
Since the offsprings all exhibited purple phenotypic characteristics, It shows that in the gene coding for colour in the flower of the pea plant, the allele for purple colour is dominant over the allele for white colour.
It further shows, according to the law segregation, that the gametes produced by the purple and white peas are dominant and recessive respectively. This Indicates that the parent purple-flowered pea is homozygous dominant (PP) while the parent white-flowered pea is homozygous recessive (pp), hence all the offsprings will be heterozygous dominant (Pp).
Answer: a. action potential frequency is high enough that no relaxation of muscle fibers occurs.
Explanation:
A tetanic contraction occurs due to repeated stimuli at short intervals. In this situation, the muscle fiber does nor relax and contracts again. It is a process of sustained contraction of muscles, which evoke when the motor nerve innervates a skeletal muscle and emits the action potential at high rate. The muscles become hyperactive in this condition.
