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Biology-Day 1

Terms in this set (33)

Life originated form outer space in the form of a resistant spare propelled by radiaton pressure, reached the earth and started the first form of life
Single Celled Organism that lacks a nucleus and membrane-bound organelles
Eukaryotic Celles
Contains organized nucleus and organelles which are enveloped by membrane-bound organelles
Life is originated by the creation and it is followed by catastrophe due to geographical distributions
Life on earth is created by a supernatural being called God
Life has no beginning and no end.
Life's been there right from the very beginning of time
Spontaneous generation that states that life can aside form non-living things
Living things aries from pre-existing living things
Louis Pasteur
Alexander Oparin and J.B.W Haldane
Richter and Arrhenius
Sir Hermann Bondi, Thomas Gold, Sir Hoyle
Bishop James Ussher and Baron Georges Cuvier
Christian Belief
Fundamental Unit of matter
Chemical structure consists of at least two atoms
Structure having a specific function in a cell
Structural and function unit of life
Group of similar cells having common functions
Group of tissues performing common function
Group of functionally related organs
Living thing consists of different organ systems functioning together
Group of organisms of the same species lubing together in an area
Group of different species living together and interacting in a habitat
group of organisms interacting to the non living environment
global sum of all eco systems
Concluded that cells arise from pre-existing cells
First to observe live cells under microscope
Coined the term cells
Proposed that plants are composed of cells
Used cork in his observation of cells
First observed and described bacteria
Staed that all diseases involve changes in normal cells
Stated that cell is the basic unit of life
Proposed that all living things are composed of cells
Stared that plants are composed of cells
Stated that animals are composed of cells
"All organisms are composed of one or more cells, and the life processes of metabolism and heredity occur within cells
"Cells are the smallest living things, the basic unit of org of all organisms"
"Cells arise only by division of a previously existing cell"
Basic unit of life in organisms of kingdom pantae
Have a ture nucleus along w/ specialized structres called organelles that carry out diif functions
Diff from plant cells bc they dont have cell walls and chloroplast
A type of cell that dominates most od the tissue cells in animals
Contains genetic material of every organisms ; directs synthesis of ribosomes and proteins
Site of many metabolic processes ; bears organelles ; maintain cell shape
Digestion of macromolecules ; recycling of worn-out organelles
Provide protection to cell ; maintain cell shape, structural support.
Modifies, sorts, tags packages and distributes lipids and proteins
Maintain cell shape, secure organelles in specific position ; allows cytoplasm and vesicl to move within cell
For protein synthesis ; for lipid synthesis
Single Celled organisms that lack nucleus or any membrane bound organelle
Usuay measure a few micro meters in length and exist together in commnunities of millions
Contains the genetic material of every bacteria
Holds the RNA, proteins and enzymes needed by bacterial cell
-Bears the organelles of rhe bacterial cell ; for cellular growth, metabolism, and replication of genetic material of bacterial cell
Assists the bacteria in attaching or adhering on a surface or sometimes to host ; involves in gene transfer mechanism calles sex pili or fertility pili
Gives the cell its shape and suroounds the cytoplasmic membrane ; helps in providing support, mechanical strength and rigidity to cell
Exchange DNA between bacteriak cells
Hair like structure that provides a means of locomotion
Helps the bacterial cell to move in clockwise and counter clockwise, forward and helps the cell to spin
Keeps the bacterium from drying out ; protects it from phagocytosis by larger microorganisms
Allows only selected materials to move inside and outside of the cell ; transportation of substances including removal of wates from the body and providing a mechanicql barrier to the cell
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Verified questions
engineering
A rectangular channel that is 10 ft wide is very smooth except for a small reach that is roughened with angle irons attached to the bottom. Water flows in the channel at a rate of 200 cfs and at a depth of 1.0 ft upstream of the rough section. Assume frictionless flow except over the roughened part, where the total drag of all roughness (all of the angle irons) is assumed to be 2000 lbf. Determine the depth downstream of the roughness for the assumed conditions.
Verified answer
biology
Cause and Effect: What impact does climate change have on organisms that are well-adapted to their environments?
Verified answer
biology
The von Bertalanffy growth function $L(t)=L_{\infty}-\left(L_{\infty}-L_{0}\right) e^{-k t}$ where k is a positive constant, models the length L of a fish as a function of t, the age of the fish. This model assumes that the fish has a well-defined length $L_{0}$ at birth (t = 0). Calculate $\lim _{t \rightarrow \infty} L(t).$ How do you interpret the answer?
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chemistry
Balance these equations. $$ \\ $$ (a) $$ \mathrm{CaC_2(s)}+\mathrm{H_2O(l)}\rightarrow\mathrm{Ca(OH)_2(s)}+\mathrm{C_2H_2(g)} $$ (b) $$ \mathrm{(NH_4)_2Cr_2O_7(s)}\rightarrow\mathrm{\mathrm{Cr_2O_3(s)}}+\mathrm{N_2(g)}+\mathrm{H_2O(g)} $$ (c) $$ \mathrm{CH_3NH_2(g)}+\mathrm{O_2(g)}\rightarrow\mathrm{CO_2(g)}+\mathrm{N_2(g)}+\mathrm{H_2O(g)} $$
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