Study Guides (390,000)
CA (150,000)
York (10,000)
BIOL (600)
BIOL 1000 (200)
Study Guide

[BIOL 1000] - Final Exam Guide - Everything you need to know! (127 pages long)


Department
Biology
Course Code
BIOL 1000
Professor
Y I Sheng
Study Guide
Final

This preview shows pages 1-3. to view the full 127 pages of the document.
York
BIOL 1000
FINAL EXAM
STUDY GUIDE

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

LEC 1
what are the common characteristics of LIFE?
-energy, produce waste, rna/dna, made of cells, interact with environment, ability of
growth, pass on traits to offspring,
the 7 characteristics of life (fig 3.2, p. 54)
1) display order
2) harness & utilize energy
3) reproduce
4) respond to stimuli
5) exhibit homeostasis
6) grow & develop
7) evolve
ex) virus are NOT considered a form of life, bc they depend on host organism to
replicate
-we need light to sustain all these activities
Light & Light Light as a source of energy
light - a source of ENERGY
-sun light: electromagnetic radiation
-the wave-particle duality theory:
1) energy travels in a form of variable wavelength (distance btwn 2 peaks)
measured in nanometers (10^-9m)
2) wavelength & energy inversely related (E=ch/λ)
3) light is composed of a stream of energy particles, photons
4) photon is packet of energy with no mass
ex) the longer the WV the shorter the energy level
ex) blue light has shorter wavelength than red
what is light?
-range of the electromagnetic spectrum (fig 1.3)
find more resources at oneclass.com
find more resources at oneclass.com
You're Reading a Preview

Unlock to view full version

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

-definition of light: portion of the electromagnetic spectrum that humans can detect
with their eyes (400-700 nm = visible light)
-this portion is the most abundant light that comes from the sun and reaches
the earth
-most of the shorter forms of radiation get absorbed and dont reach earth
-to impact all living things, its only this visible light that interacts and makes
an impact. It can be converted into energy to supply living activities
light encounters matter
-absorbed only by this way can it be converted into energy for living organisms
-reflected
-transmitted
absorption of a photon
-to be used as energy or info, absorption must take place
-electrons travels at ground, lower-energy state. When light hits it, converted to
energy, photon then moves electron from ground to excited state
-when it moves back down, energy is released as heat & light (florescence)
-the energy will be transferred to other electrons (ex: photosynthesis)
-photon energy has to match the energy needed to move the electron from the
ground state to the excited state (fig 1.4, p. 5)
-blue arrow = diff btwn energy in ground & excited state
-only specific wavelengths of light can be abs by a photon
pigments: light absorbers
-how is light captured by pigments?
-why do pigments have diff colors?
-pigments: light absorbers --they display diff colors (ex: carotene = orange)
find more resources at oneclass.com
find more resources at oneclass.com
You're Reading a Preview

Unlock to view full version