Environmental B (Qs) Unit 4
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Describe what the United Sates census is.
It’s an extensive nationwide information-gathering project conducted by the US federal government.
How often does the census take place?
Every 10 years
Describe the kind of information about the population that is gathered by the census.
The information consist of the size of the population, age, employment, ethnicity, housing, income, race, and gender.
What groups help decide the content of each census?
The Census Bureau, with the approval of the Office of Management and Budget and of Congress. They also consult federal state and local agencies; and business executives, educators, and researchers
Why have most genetically modified crops been produced?
To make new traits that can benefit farmers, food manufacturers, consumers, or the environment. For example, some of the genetically modified crops have increased resistance to disease or to damage from insects.
Which countries are currently the major producers of GMOs?
US, Argentina, Brazil, Canada, China, and India
Explain how most people in the US and other GM food-producing countries have eaten some form of genetically modifies food
Many ingredients used in processed foods, like sweeteners and starch come from corn or soybeans which is the most genetically modified plants in the US. Therefore, people have eaten a version of GMP
What 2 variables cause a population to increase and what two variables cause a population to decrease?
Increase: Birth (Reproduction) Immigration Decrease: Emigration Death (Organisms dieing)
In nature, no population can increase its size indefinitely. Explain why this is so
Maintating Mastery Limited amount of resources
Describe the 3 age categories used in age-structure diagram
Post-reproductive- Reproductive Pre-reproductive
Age-structure diagram of a population that is growing rapidly vs. Age structure diagram of a population that is reducing in size
Rapid Larger pre-productive Small amount of people dieing Reducing Larger Reproductive Large amount of people dieing
Describe what a GMO is
Take a gene from another species and insert it into the GMO Desirable trait
2 advantages and 2 disadvantages of GMOs
Maintaing Mastery Disadvantages Irritation to your body (DNA–DNA reads protiens may negativly react to the genes in food New DNA may cause All of them have the same DNA, then if there is a genetic issue, then they will all have that genetic issue Company owns its organisms (They can sue you if you use thier GMOs) Advantage You can make it resitant to things (disease drought) You can make more food by bigger fruit or more fruit on a tree You can add compounds that the organism couldn’t make before
Describe the most common interaction between species
Fighting for resources (Competition for resources)
Explain how the can toad is an efficient invasive species
Reproduces rapidly, Can eat anything, Has defense against predators, can live in most places as long as it has water
Did the Can toads do their job?
Hunting time of the Frog does not overlap with the life cycle of the grub (Cane is short when the the beetle is in the grub stage (when the frog would eat it0 Can is short, but the beetle is in it’s beetle stage
Wolf strategy
Pack hunting, isolates prey and