Answer:
Skeletal muscle tissue is composed of cells called muscle fibers. When the nervous system signal reaches the neuromuscular junction a chemical message is released by the motor neuron. The chemical message, a neurotransmitter called acetylcholine, binds to receptors on the outside of the muscle fiber.
C.Adenine and guanine<span> are </span><span>purines in DNA.</span>
They unite to form a zygote then an embryo. Most produce both male and female gametes.
Answer:
Explanation:
Each of the organelles in the cytoplasm of a cell composed of water, proteins and RNA, and whose function is to participate in the synthesis or manufacture of proteins.
Species are going extinct before we know it because species are constantly adapting to their environment leading them to then evolve with different traits more suitable for their environment, thus creating species out of the ones that previously existed.
