Question

QUESTION 59

1. Why does a good night's sleep matter?

   	A.	It minimizes stress.
   	B.	It decreases risk of heart disease, diabetes, and cancer.
   	C.	It reduces the risk of depression and of being overweight.
   	D.	It improves memory.
   	E.	All of the above

1 points   

QUESTION 60

1. Why do we need to eat a variety of foods?

   	A.	No single food contains enough energy to run a body.
   	B.	No single food provides everything we need to be healthy.
   	C.	It's too boring to eat the same thing all the time.
   	D.	Parts of your digestive tract that aren't working will atrophy.
   	E.	You tend to overeat if you eat just one thing.

1 points   

QUESTION 61

1. Which of the following best describes a muscle contraction?

   	A.	At the signal to contract, ATP provides energy to allow sacromeres to slide over myosin filaments, pulling z-disks together.
   	B.	At the signal to contract, ATP provides energy to allow myofibrils pull z-disks closer together.
   	C.	At the signal to contract, ATP provides energy to allow tendons to pull sacromeres closer together.
   	D.	At the signal to contract, ATP provides energy to allow myosin heads to pull the actin filaments thereby pulling z-disks closer together.
   	E.	At the signal to contract, myosin produces energy to allow actin filaments to slide over z-disks, pulling sacromeres together.

1 points   

QUESTION 62

1. Capture of solar energy might be considered something we get from which of the following support services that ecosystems provide?

   	A.	Regulating services
   	B.	Supporting services
   	C.	Provisioning services
   	D.	Cultural services
   	E.	Development services

1 points   

QUESTION 63

1. Clownfish live inside anemones. The clownfish get protection and the anemone eats scraps from clownfish meals. This is an example of which of the following?

   	A.	Competition
   	B.	Mutualism
   	C.	Competitive exclusion
   	D.	Exploitation
   	E.	A unique interaction among very different species

1 points   

QUESTION 64

1. According to Gause, two species that use the same resource do fine when they exist separately, but one outcompetes the other when they're together. What does this illustrate?

   	A.	The competitive exclusion principle
   	B.	Mutualism
   	C.	Murphy's law
   	D.	The life-dinner principle
   	E.	Competition

1 points   

QUESTION 65

1. Why should we care about the services that intact ecosystems provide?

   	A.	Because we can make lots of money from ecosystems.
   	B.	We shouldn't, really. We don't impact them.
   	C.	Because our survival depends on those ecosystems. We can't afford to do all that they do.
   	D.	Because people are in charge of the Earth.
   	E.	We shouldn't really. We impact them but they keep doing what they do.

1 points   

QUESTION 66

1. Living organisms use nitrogen to make proteins and DNA, so how does that nitrogen eventually get back to the atmosphere in the nitrogen cycle?

   	A.	Denitrifying bacteria producing N2
   	B.	Denitrifying bacteria producing nitrates
   	C.	It dissolves in water and then evaporates back to the atmosphere.
   	D.	Exhalation
   	E.	Nitrogen is 79% of the atmosphere, so while it does cycle around, the amount living things contribute is negligible.

Answer 1

Question 59: Answer-E

During sleep, various processes take place especially in the brain that helps for rejuvenation of the entire body. These processes include cleaning activities in brain and removal of toxins etc.

Question 60: Answer-B

Carbohydrates, Proteins, Vitamins, Fats are the essential nutrients required for proper functioning and development of the body. All these cannot be obtained( difficult to get in required amounts) from a single source of food.

Question 61: Answer- D

Factual Question.

Question 62: Answer- B

Supporting services provides an ecosystem with food supply, flood regulation, and water purification.

These include primary production of food by plants which involves capturing of solar energy, nutrient cycling, pollination, etc