Explanation

ai. Agricultural ecology is the study of crop plants and farm animals in relation to their environment

Agricultural ecology is the interaction of crop plants and farm animal with the biotic and abiotic environment.

aii. Ecosystem refers to the interaction of a community of biotic components (plants and animals) with their abiotic components (non-living things)

bi.

-Crops

-Microorganism/Virus/Bacteria

-Farm animals

-Soil living organisms/Earthworms

-Weeds

-Insect and pests

-Protozoa

-Producers

-Consumers

-Decomposers

-Parasite

bii.

-Temperature

-Relative humidity

-Rainfall/precipitation

-Rock

-Wild fire

-Water

-Wind/air/storm

-Sunlight

-Dust

-Minerals

-Soil

c.

-Storehouse should be rain proof

-Ensure adequate ventilation in storehouse

-Windows should be netted against insects

-A simple metal roof should be constructed

-Floors and walls should be cemented with no cracks for insects/ rats to hide

-Spaces should be left between bags and between bags and the wall

-Grains must be absolutely dry before storage

-Storehouse should be fumigated before moving in a new batch of maize

-Storehouse should be cleaned regularly

-Bags of maize must be stored on the basis of first in-first out

-Keep bags on wooden pallets to prevent deterioration due to moisture/store bags off the floor

-Maize bags should be properly sealed

d.

-Morning glory Lantana

-Amarantus

-Zinnia

-Cana lily

-Gloriosa

Crotolaria

-Marigold

-Bachelor's button

-Water lettuce

Correct Answer: B. is unique

Correct Answer: A) Production

Explanation

Out of the given options, the correct answer is Option A: Production.

Production is the process of combining resources, such as labor, capital, and raw materials, to create goods and services to satisfy human wants. It involves transforming inputs into outputs that are useful and valuable to consumers.

Consumption, Option B, refers to the act of using or consuming goods and services to satisfy human wants.

Industrialization, Option C, is the process of developing industries on a large scale, usually involving the use of advanced technology and machinery.

Occupation, Option D, refers to a person's regular work or profession.

In this case, the correct answer is Production because it specifically relates to the creation of utilities to satisfy human wants.

To learn more about this, please read the relevant sections of the recommended textbooks.

Correct Answer: D. 4.20m

Explanation

Let the actual length of the room = y m

\(\therefore \frac{y - 3.99}{y} \times 100% = 5%\)

\(100(y - 3.99) = 5y \implies 100y - 399 = 5y\)

\(100y - 5y = 399 \implies y = \frac{399}{95}\)

y = 4.2 m

Correct Answer: D. the total energy of the system is always constant

Correct Answer: C. 1.20s

Explanation

T = t/n=60/50=1.2

Correct Answer: A. I, II, III

Explanation

Income = $1,300 grant

Grant on different aspects:

Magazine = \(\frac{10}{100} \times 1300 = $130\)

New books = \(\frac{35}{100} \times 1300 = $455\)

Damaged books = \(\frac{15}{100} \times 1300 = $195\)

New furniture = \(\frac{30}{100} \times 1300 = $390\)

Library staff = \(\frac{10}{100} \times 1300 = $130\)

For pie chart,

Magazine = \(\frac{130}{1300} \times 360° = 36°\)

New books = \(\frac{455}{1300} \times 360° = 126°\)

Damaged books = \(\frac{195}{1300} \times 360° = 54°\)

New furniture = \(\frac{390}{1300} \times 360° = 108°\)

Library staff = \(\frac{130}{1300} \times 360° = 36°\)

(b) Percentage increase = \(\frac{455 - 390}{390} \times 100% =16.67%\)

Correct Answer: B. Principles of comparative cost

Correct Answer: A. N6000