1- C
2-A
3-C
4-D
5-A (not sure)
6-C
7-C
8-C
9-A
10-D
So all we know is that the student stated something ("<span>if plants are added to an indoor environment the air quality will improve
"). This is only a statement - it's not a test whether this statement is true yet.
So the correct answer is: it is a hypothesis.
</span>
Answer: Five
Each pond or lake have typically five zones in common.
1. The littoral zone: It is the shore area of the pond or lake. It is a transition zone between the dry shore area and the open water.
2.The limenetic zone: It is the open water area of the lake or pond. This is the portion of water that receives sunlight light.
3.The euphotic zone: It is the zone where, algae and other plants grows. Also, this zone favors the growth of aquatic animals such as fishes, because oxygen levels are higher as this zone traps the atmospheric oxygen.
4. The profundal zone: It is the zone located below the limentic zone. This zone is not penetrated by sunlight. The size of the zone depends upon the age and water clarity of the pond or lake. It exhibit low fish and plant population because of the lack oxygen present in this zone.
5. The benthic zone: It is the zone which is found at the bottom of the lake or pond. It consists of organic sediments and soil. This zone involves decomposition activity of the dead organic matter obtained from dead algae, plants, fish and animal wastes.
Answer - the tendon sheath is connective tissue bag surrounding a tendon and a bursa is a fluid-filled sac which cushions the tendon.
