Answer:
The theory of natural selection, formulated by Darwin, explains how organisms with better characteristics are able to survive and reproduce. According to the theory of Darwin, genetic variations occur among organisms of a species. Those organisms which have better adaptations to survive in the environment are able to survive and pass on their traits to their offsprings. The organisms not having better characteristics are not bale to survive and those traits get completely removed through the process of evolution.
For example, Darwin studies showed that The Galapagos island comprised of 13 different kinds of finches on different islands. The main difference between these finches was their beaks. The differences in the beaks occurred due to the different modes of nutrition in the finches of different islands.
Answer:
genetic engineering
Explanation:
Genetic modification or Genetic engineering is the method of using recombinant DNA (rDNA) technology to change an organism's genetic makeup.
In Genetic egineering a gene is isolated from the body of one organism and incorporated into the body of host cell in order to produce new gene variety with some advantages.
Here also, scientists have incorparetd a barley gene into a type of rice that developed a new rice variety with muchlower methane emissions.
Hence, the process used by scientists is genetic engineering.
Answer:
Food web --> a model that shows interconnected food chains in an ecosystem
Predator --> an organism that kills another for food
Prey --> an organism that is killed and eaten by another
Ecosystem --> all of the living and nonliving things that interact in a particular area
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Answer:
Environmental impacts of particles, such as dust and smoke, released from livestock production - impair the visibility, can lead to acid rain, degrade the ecosystem
Environmental impacts of greenhouse gases released from livestock production - increase in atmospheric temperature
Explanation:
Environmental impacts of particles, such as dust and smoke, released from livestock production -
Release of particles such as dust and smoke is referred to as particulate pollution. These particle makes the air unfit for .breathing. If humans inhale it, it will adversely affect the heart and lungs.
These particle impair the visibility, can lead to acid rain, degrade the ecosystem etc.
Environmental impacts of greenhouse gases released from livestock production -
Green house gases will lead to increase in atmospheric temperature