Correct Answer: C. trophic level

Correct Answer: A. 4

Explanation

\(\sqrt{2}(\sqrt{6} + 2\sqrt{2}) - 2\sqrt{3}\)

\(\sqrt{12}\) + 2 x 2 - 2\(\sqrt{3}\)

2 \(\sqrt{3}\) - 2 \(\sqrt{3}\) + 4

= 4

Correct Answer: D. 100

Explanation

Recall how to find the average of a set of numbers: Mean/Average=Sum of all valuesNumber of values Now, let x be the score Michael needs on his last test in order to have a test average of 80. 80=(65+90+78+67+x)/5 Now, solve for x. 300+x=400 x=100

Correct Answer: B. the alimentary canal of farm animals could be blocked

Correct Answer: C. joint stock company

Correct Answer: C. 36

Correct Answer: B. A pair of callipers

Correct Answer: D. Milk of magnesia 10.5

Correct Answer: B) Maintenance of internal environment of an organism

Explanation

The question is asking about the definition of homeostasis. Homeostasis is the maintenance of a stable internal environment in an organism despite changes in the external environment. This means that the organism tries to keep its internal conditions, such as temperature, pH, and glucose levels, within a narrow range that is optimal for its survival. Option A states that homeostasis involves the regulation of both external and internal conditions of organisms. Although organisms do regulate their external conditions to some extent, this is not the definition of homeostasis. Option B is correct. It correctly defines homeostasis as the maintenance of the internal environment of an organism. Option C states that homeostasis involves the maintenance of both internal and external environments of an organism. This is not the correct definition of homeostasis as it only involves the maintenance of the internal environment. Option D states that homeostasis involves the regulation of the chemical environment of an organism. Although homeostasis does involve the regulation of chemicals in the body, this is not a complete definition of homeostasis. In summary, the correct definition of homeostasis is the maintenance of a stable internal environment in an organism despite changes in the external environment.

Explanation

(b)(i) The main features of continental shelf are:

(i) contains shallow water

(ii) It is a continuation into the of the coastal plain

(iii) It forms a gentle slope into sea

(iv) It is under the influence of wave erosion deposition

(v) It contains lots of planktons

(ii) The main features of ocean deeps are:

(i) They are long nar trenches that plunge as great ocean deeps of over 90

(ii) May or may not be located in the midst of ocean

(i represents the deepest parts of the ocean

(iv) Contains lots of deposits such as oozes clay, etc

(c) The economic importance of continental shelves man;

(i) Continental shelves are the richest fishing grounds in the world due to the abundance of planktons (fish food). These planktons are numerous because of the shallow-ness of the continental shell which enable sunlight to penetrate to the bottom of shelves.

(ii) It provides employment to many people, fishermen

(iii) Development of seaports. This is due the shallow nature of the continental shelves.