Biology and the Characteristics of Life. Aim: How do living things carry out metabolic activities?...
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Transcript of Biology and the Characteristics of Life. Aim: How do living things carry out metabolic activities?...
![Page 1: Biology and the Characteristics of Life. Aim: How do living things carry out metabolic activities? Do now: Answer the following question: How do you know.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0121a28abf838ccc5c3/html5/thumbnails/1.jpg)
Biology and the Characteristics of Life
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Aim: How do living things carry out metabolic activities?
• Do now: Answer the following question:
• How do you know if an organism
• is living?
• Vocabulary: life functions, homeostasis, develop, reproduction
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What is Biology?
the study of
living things.
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Living things are diverse.
Largest animal is the blue whale.
• 33 yards in length (about 1/3 football field)
• weigh up to 130 metric tons (= 30 elephants)
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Largest plant is the
giant sequoia tree.
Over 100 yards tall.
![Page 7: Biology and the Characteristics of Life. Aim: How do living things carry out metabolic activities? Do now: Answer the following question: How do you know.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0121a28abf838ccc5c3/html5/thumbnails/7.jpg)
Smallest living things are bacteria.
• Size – 10-6 meters
• 100 times smaller than a dot or period.
![Page 8: Biology and the Characteristics of Life. Aim: How do living things carry out metabolic activities? Do now: Answer the following question: How do you know.](https://reader035.fdocuments.us/reader035/viewer/2022062500/5697c0121a28abf838ccc5c3/html5/thumbnails/8.jpg)
What makes a living thing “alive”?
Characteristics of living things.
• All living things are made of cells.Unicellular = 1 celled (ex. Bacteria, yeast)
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Multicelled = many cells (Frogs, mice, humans)
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2) Living things maintain
homeostasis.…a stable internal
environment.
EX: People sweat when
they need to cool their
bodies and shiver to
warm them.
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Living things reproduce and use DNA, the genetic material, to carry heritable information.
3) Reproduce
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Asexual reproduction: only one organism, offspring are exactly like parent.
(ex: Unicellular organisms divide by binary fission.)
Two types of reproduction: asexual and sexual.
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Sexual Reproduction: two organisms. Fertilization of egg cell by a sperm cell. Offspring will be a “mixture” of the parents.
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4) Living things have organization
subatomic particles --> atoms --> molecules --> organic molecules ---> cells --> tissues --> organs
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5) Living things grow & developGrowth and development occur through
cell division.
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6) Living things obtain energy
Organisms can obtain energy in 2 main ways:a) Autotrophs – make their own food (ex: plants & algae)
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b) Heterotrophs – eat other organisms (ex: lions & tigers &
bears)
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7. Living things respond to stimuli
They may move toward an external stimulus or away from it.
Movement is part of the behavior of a living thing.
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8. Living Things Evolve
• Groups Of Organisms (Not Individuals) change over time in order to survive within changing environments.
• Fossil records show changes in groups of organisms
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QUIZ -Living things share 8
characteristics. Which two are missing from this list?
• Grow and develop
• Obtain energy
• Respond to stimuli
• Maintain homeostasis
• Reproduce
• Have organization