Correct Answer: A. there are difficulties in coordinating production

Explanation

Diseconomies of scale happen when a company or business grows so large that the costs per unit increase. One of the reasons for Diseconomies of scale Loss of direction and co-ordination of production activities. It is harder to ensure that all workers are working for the same overall goal as the business grows. It is more difficult for managers to supervise their subordinates and check that everyone is working together effectively, as the spans of control have widened. A manager may be forced to delegate more tasks, which while often motivating for his subordinates, leaves the manager less in control.

Explanation

(a)(i) The characteristics of a delta include:

(i) The branching of rivers into channels called distributaries

(ii) Large deposits of weathered materials

(iii) It is formed at the mouth of rivers

(iv) It takes up the shape of a fan

(b) The r of formation of a delta is influenced by the following factors;

(i) Active vertical and lateral erosion in the upper course of the river to provide extensive sediments to be deposited as deltas

(ii) The coast should be sheltered or tic',

(iii) The sea adjoining the delta should be shallow or else the load will disappear in the deep waters

(iv), Absence of lakes in the river course to filter off the sediments

(v) Absence of strong current running at right angles to the mouth so as not to wash away sediments

(b)(i) Characteristics of caldera:

(i) It is formed from volcanic activities

(ii) It is a depression on volcano cones with steep sides

(iii) Depression of magma gives rise to caldera

(iv) It may contain water called caldera lake. Caldera is formed when composite volcano explodes violently, its top is blown off and disintegrates into a mass of rocks and ashes, leaving the crater greatly enlarged. The huge crater-like depression is coiled caldera. It can also be formed through subsidence. The depression may result in accumulation of water to form caldera lake

Correct Answer: B. spoke in tongues

Correct Answer: B. 14.8%

Explanation

. % of C in Ca(HCO3)2 Molar mass of Ca(HCO3)2 = 40+(1+12+(16*3))2 =40+(13+48)2 =40+122 =162 C/Ca(HCO3)2 x 100 =12 * 2/162 * 100 =14.8%

Correct Answer: B. Large-scale farming

Correct Answer: A) Scales

Explanation

Reptiles and birds are two groups of animals that share some similarities in their physical characteristics. The question is asking which structure is common to both reptiles and birds among the given options. The options are scales, legs, beaks, claws, and all of the above. Scales are thin, plate-like structures that cover the skin of reptiles and some birds, providing protection and reducing water loss. Legs are appendages that help reptiles and birds move around. Beaks are specialized mouthparts that birds use to catch and eat their food. Claws are sharp, curved nails that reptiles and birds use for defense and hunting. Out of the given options, the structure that is found in both reptiles and birds is scales. Scales provide similar functions in both groups, such as reducing water loss and protecting the skin. Therefore, option A, scales, is the correct answer. It is important to note that while legs, beaks, and claws are also found in both reptiles and birds, they are not exclusive to these groups and can also be found in other animals. To learn more about the characteristics of reptiles and birds, please read the relevant sections of the recommended textbooks.

Correct Answer: A. a reducing agent

Correct Answer: B. so

Explanation

The correct word is 'so'. In this context, 'so' is used as an adverb to emphasize an adjective. Therefore, the sentence should read 'The test seemed so simple that we thought we would all pass.'

Correct Answer: D. it has not yet been issued

Correct Answer: D. thallophytic