The reward system in the brain is the center of wanting and pleasure, and is the main cause of repeated actions because of the release of some neurotransmitters which does ensure the survival of one's self and offspring. The behavior is a part of organism and organizational level, and neurotransmiters are part of the cellular level.
Answer:
B. Lysosome
Explanation:
It contains digestive enzymes.
Answer:
2.3 and 4 only
Explanation:
Mutation is an alteration in the gene of an organism, which can cause some physiological and physical changes in the organism.
Mutation can have a favorable positive effect on an individual (e.g increasing microorganisms resistance to antibiotics) increasing its chances of adaptability and survivability, it can have a negative effect on the individual (e.g cancerous cells) which can reduce its survivability, and can have no effect at all on the individual (e.g having eyes with 2 different colors).
Answer:
Composite, shield, cinder cones, and supervolcanoes are the main types of volcanoes.
Composite volcanoes are tall, steep cones that produce explosive eruptions.
Shield volcanoes form very large, gently sloped mounds from effusive eruptions.
Volcanoes have several shapes, which are controlled by the composition of the magma and the nature of its eruption. If a volcano produces very fluid lava (low in the compound SiO2, or silica), the magma flows a long distance before it cools, making a flat, shield-shaped volcano.
Explanation: