Question 1 Humans have affected different organism populations in which of the following ways? (Select all that apply) overfishing agriculture poaching habitat destruction An explanation supported by a large body of observations and experimentation is referred to as a(n): hypothesis. investigation. prediction. supposition. theory. Interactions between organisms lead to the evolution of particular traits in populations of those organisms over time. False True Mutations always result in death of the organism that acquires them. False True Variation among individuals in a species is usually caused by: environmental variation. Solution 1. Human activities, in its extreme form have adversely affected different population of organisms. The important activities that contributed to the negative impacts include overfishing, poaching, agriculture, and habitat destruction. Overfishing happens when large volumes of fish are caught than its population is capable of replacing through natural reproduction. This activity adversely affects the balance of life in the oceans and also the social and economic well-being of the coastal communities\' dependant on fishing as their livelihood. Eg: The population of Atlantic bluefin tuna has declined and is facing near extinction. Targeted fishing of predators, such as tuna and groupers, led to over population of smaller marine species, such as sardines and anchovies, thus changing the marine ecosystem. The State of World Fisheries and Aquaculture (SOFIA) by United Nations has published a two yearly report in 2006 giving the statistical data on the effects of overfishing. Poaching is the activity of illegal or unauthorized hunting of a specific animal species for sport or profit. The excessive and unregulated hunting of African elephants for their tusk has lead to the drastic reduction in their population. The poaching of wolves, which is the natural predator of elk, lead to an unsustainable population level of the later resulting in scarcity of food sources and their mass extinction. The unsustainable agricultural practices pose the greatest instant threat to species and ecosystems around the world. The adverse environmental impacts include habitat loss of species (due to land conversion), environment pollution, soil erosion, climate change and genetic erosion. Habitat destruction occurs when irreversible change has happened to an area that is incapable of supporting the natural wildlife. This change can be destruction, fragmentation, or degradation. Eg: Clearing a wooded area using bull dozer, filling of wetlands, construction of roads and dams etc..

1. Question 1 Humans have affected different organism populations in which of the following
ways? (Select all that apply) overfishing agriculture poaching habitat destruction An
explanation supported by a large body of observations and experimentation is referred to as a(n):
hypothesis. investigation. prediction. supposition. theory. Interactions between organisms lead
to the evolution of particular traits in populations of those organisms over time. False True
Mutations always result in death of the organism that acquires them. False True Variation
among individuals in a species is usually caused by: environmental variation.
Solution
1. Human activities, in its extreme form have adversely affected different population of
organisms. The important activities that contributed to the negative impacts include overfishing,
poaching, agriculture, and habitat destruction.
Overfishing happens when large volumes of fish are caught than its population is capable of
replacing through natural reproduction. This activity adversely affects the balance of life in the
oceans and also the social and economic well-being of the coastal communities' dependant on
fishing as their livelihood. Eg: The population of Atlantic bluefin tuna has declined and is facing
near extinction. Targeted fishing of predators, such as tuna and groupers, led to over population
of smaller marine species, such as sardines and anchovies, thus changing the marine ecosystem.
The State of World Fisheries and Aquaculture (SOFIA) by United Nations has published a two
yearly report in 2006 giving the statistical data on the effects of overfishing.
Poaching is the activity of illegal or unauthorized hunting of a specific animal species for sport
or profit. The excessive and unregulated hunting of African elephants for their tusk has lead to
the drastic reduction in their population. The poaching of wolves, which is the natural predator of
elk, lead to an unsustainable population level of the later resulting in scarcity of food sources and
their mass extinction.
The unsustainable agricultural practices pose the greatest instant threat to species and ecosystems
around the world. The adverse environmental impacts include habitat loss of species (due to land
conversion), environment pollution, soil erosion, climate change and genetic erosion.
Habitat destruction occurs when irreversible change has happened to an area that is incapable of
supporting the natural wildlife. This change can be destruction, fragmentation, or degradation.
Eg: Clearing a wooded area using bull dozer, filling of wetlands, construction of roads and dams
etc.