OBAC101 NATURAL SCIENCE New

Description

SESSION	SPRING 2024
PROGRAM	BACHELOR OF ARTS
SEMESTER	I
COURSE CODE & NAME	OBAC101 NATURAL SCIENCE
CREDITS	4

 

Assignment Set – 1

Questions

 

1. A. List differences between shopping goods and specialty goods, with 2 examples under each category.

Ans: Differences between Shopping Goods and Specialty Goods Definition and Consumer Behavior: 

Shopping Goods: These are items that consumers typically compare on attributes such as quality, price, and style before making a purchase decision. Consumers spend more time and effort in the decision-making process.

Specialty Goods: These are items that have unique characteristics or brand identification for which a significant group of buyers is willing to make a special effort to purchase. Consumers usually exhibit strong brand loyalty and are less price-sensitive.

Frequency of Purchase: 

Shopping Goods: Purchased less

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2. List and explain all the agents that go into the formulation of paints. Explain the importance of inclusion of each of these agents, and cite examples of these agents.

Ans:

Paints are complex mixtures of various components that each play a crucial role in the final product’s properties, performance, and application.

The key agents that go into the formulation of paints are: 

1. Pigments Purpose: Provide color, opacity, and certain protective functions.

Types: Color Pigments: Provide the desired color to the paint.

Examples include titanium dioxide (white), iron oxides (red, yellow), and phthalocyanine blue.

Extender Pigments: Improve

 

3. List and explain benefits of pesticides. Pls also list and explain harmful effects of pesticides in detail on all living beings and environment. Let your answer be specific to the pesticide agent, and the target impacted by the same.

Ans: Benefits of Pesticides:

Crop Protection: 

Target: Crops Explanation: Pesticides protect crops from pests such as insects, weeds, and diseases, preventing yield losses and ensuring food security.

Disease Control: 

Target: Humans and Animals Explanation: Pesticides help control vector-borne diseases by killing disease-carrying insects like mosquitoes and ticks, reducing the spread of diseases such as malaria, dengue, and Lyme disease.

Enhanced Public Health: 

Target:

Humans Explanation:

 

 

Assignment Set – 2

Questions

 

4. A. Describe the contribution of Science and Technology in Agriculture.

Ans: The contribution of science and technology in agriculture has revolutionized the way food is produced, enhancing productivity, efficiency, and sustainability.

Here are several key aspects of how science and technology have impacted agriculture: 

1. Increased Crop Yields:

Crop Breeding: Advances in genetics and biotechnology have enabled the development of high-yielding crop varieties with desirable traits such as disease resistance, drought tolerance, and improved

 

 

5. A. What are the chemicals used in Cosmetics? Classify them based on the class of cosmetic, listing benefits and harmful effects, against each class of chemical.

Ans: Chemicals used in cosmetics vary widely depending on the type of cosmetic product and its intended use.

Here, I’ll classify some common classes of chemicals used in cosmetics and provide examples, along with their benefits and potential harmful effects: 

1. Surfactants: Examples: Sodium lauryl sulfate, Cocamidopropyl betaine Benefits: Surfactants act as cleansing agents, helping to remove dirt, oil, and debris from the skin and hair. They also contribute to the foaming and lathering properties of cosmetic products.

Harmful Effects:

 

 

6. A. Justify the need for growing GMO crops for human and animal consumption.

Ans: The need for growing genetically modified organisms (GMO) crops for human and animal consumption arises from several key factors: 

1. Food Security: Increased Yield: GMO crops are often engineered to exhibit traits such as pest resistance, disease resistance, and drought tolerance, leading to higher yields and improved crop productivity.

Global Demand: With the world’s population expected to reach nearly 10 billion by 2050, there is a growing demand for food to feed a growing population. GMO crops offer a solution to meet this demand by producing more food on existing agricultural land.

2. Environmental Sustainability:

Reduced