Its C i think! i hope this helps
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Answer:
As organisms adapt to changing conditions, they evolve in a way to fit their surrounding environment. According to Darwin's <em>survival of the fittest</em> concept, organisms that can adapt to fluctuating conditions are more fitter and hence selected by nature.
Here fitter means reproductive superiority.
Sternocleidomastoid muscles.
Explanation:
The neck movements like flexion, rotation, extension, lateral rotation and flexion are carried out by neck muscles which include the sternocleidomastoid muscle,
The sternocleidomastoid muscle is a pair of muscle located superficially in the anterior neck.
The sternocleidomastoid muscles connects skull with the clavicle and hence is involved the head and neck motions.
The `bilateral contraction movements of sternocleidomastoid muscles aids in flexion of the neck and brings the chin down towards the breastbone.
Platysma is a facial muscle and involved in facial expressions and mandibular movements
Semispinalis muscle is in the posterior neck and maintains posture and head movements.
Trapezius muscles lies at the back of the head.
Answer:
Aquaculture and fishing are different from each other in many aspects.
Explanation:
Aquaculture can be defined as the process of cultivation of both the aquatic plants and animals, where as Fishing can be defined as catching or harvesting different fishes only. Aquaculture can be of two types- Marine water and fresh water aquaculture. Aquaculture increased the production of food for the consumption of human and also increase the national import level. Fisheries generally deals with catching and selling fishes. Main point that can be noted is- pearls can be gained only through the process of aquaculture not through fishing.
Since you didn't endow us with any choices, I'll list some possible explanations:
- Increase in food
- Decrease in predators/enemy species
- Resorted to a new niche
- Lower death rate
- Higher birth rate
I hope I helped!
