Answer:
The first and 2nd pictures basically capture what they look like.
Answer:
The correct answer is - option A. short and less complex.
Explanation:
A food web is a network of many food chains. The food chain is one pathway that describes the path of the animals finds food, it is linear representation. Food web shows all the plants and animals in connection with each other in the food web.
In the Arctic, biodiversity is comparatively low with fewer species of flora and very less number of fauna that include caribou, hare, musk ox pika, and insects are the primary consumers.
Secondary consumer eats herbivores and these organisms are normally are top trophic levels in arctic include fish and polar bear. So the consumers, primary consumer and predators or secondary consumers form a short and less complex.
Thus, the correct answer is - option A. short and less complex.
Answer:
The correct answer is: <em>C. Increased average lifespan to 78 in the US.</em>
Explanation:
Science has impacted human health by increasing the average lifespan to 78 in the US. Over the last couple of decades, the life expectancy of Americans has increased significantly than what it was 200 years ago. This can be attributed to:
1. Vaccinations- Since the invention of vaccinations, diseases such as tuberculosis, cholera and polio which were major causes of death 200 years ago have virtually been eradicated in the US.
2. Abundant and safer foods available- Commercial and large scale farming has made a wide variety of nutritious foods easier to obtain.
3. Improved sanitation- Safer drinking water, sewage treatment and stricter food inspection has significantly reduced the rate of illnesses due to poor hygiene and sanitation.
In these ways, science has impacted human health by increasing the average lifespan to 78 in the US.
