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BIOL 111 - Lecture 0
What is life?
10
Biology
Undergraduate 1
09/02/2011

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Term
3 criteria for life
Definition
1. transform energy to synthesize new molecules (metabolism); 2. make faithful copies of oneself (reproduction); 3. regulate internal environment to adapt to changes in the external environment (maintain homeostasis)
Term
Metabolism is described as...
Definition
the sum of all the chemical reactions in the body
Term
Metabolism is fuelled by ____ which is created during the process of ____
Definition
ATP (adenosine triphosphate); cellular respiration
Term
Sources of energy can be:
Definition
1. light; 2. inorganic; 3. organic
Term
Reproduction can be either ___ or ____
Definition
asexual; sexual
Term
asexual reproduction is characterized by: __2__
Definition
1. no fusion of gametes; 2. NO genetic difference between parent and offspring
Term
sexual reproduction is characterized by: ___2___
Definition
1. fusion of gametes; 2. gen. difference between parent and offspring
Term
Homeostasis: organanisms have _____ to respond to environmental _____
Definition
adaptations; changes
Term
E.gs of adaptations include: cacti which __________ to prevent against_____; leaf variation such as the case of grapes which ________ to ______ and the pitcher plant which _______ to ______
Definition
store water in grooves; dehydration; have specialized leaves called tendrils; grab onto environment; digests insects; get nutrients (N2) that are scarce in the soil
Term
What is the mechanism that drives variation in life?
Definition
evolution
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