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IB Biology markscheme, past exam papers, notes and 2012 IB Biology syllabus. IB Biology option D evolution markscheme. IB Biology option D evolution notes, IB Biology option D Evolution exam papers, IB Biology option E markscheme, IB Biology option E notes, IB Biology option E Neurobiology papers, IB Biology Option A Human Nutrition and Health syllabus 2012, Stimulus and response, Homologous structures, Pavlov experiments.
In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
A. The development of the has allowed us to study cells and their pro.pdfthangarajarivukadal
A. The development of the has allowed us to study cells and their processes 1. T a. Resolution is
the ability ofamicroscope to show two objects as separate Magnification is how much larger an
object appears compared to its actual size a Light microscopes are the kind we use in lab. They
function by having visible light pass through an object, and then glass lenses enlarge the object.
b. Electron microscopes use beams of electrons. They have better resolving and magnification
capabilities that allow us to see organelles and their parts. 3. Cell Theory states that all living
things & come from other cells. This theory developed as a result of contributions of 5 people
van Leeuwenhoek- 1 microscope in the 17 century b. Robert Hooke was the first person to use
the term cell to describe the basic structure of living organisms. When observing cork he noticed
that it was full of small room like structures. These structures resembled the cells that monks
lived in thus he coined the term cell in relationship Schleiden-plants are composed ofcells to
living organisms. d Schwann-animals are composed of cells e. Virchow-cells don\'t just appear
they come from preexisting cells. B. Two major classes of cells. which is coiled in region where
the nuc leus would be if the cell had a nucleus. This group includes the archaea and bacteria have
a true nucleus which is bordered by a double membrane called the nuclear enve lop. This group
includes the protists, fungi, plants, and animals collectively known as the Eukarya.
Characteristics of eukaryot ic cells A. Cytoplasm is the space in a cell between the It contains
organelles within a fluid called B. Membrane Structure and Function 1. The serves as the border
of the cell. Its unique structure allows it to regulate what enters and exits a cell, for this reason it
is oft called the gate keeper 2. Membrane Structure pecialized lipids known as make up most of
the membrane. These structures have a or water loving head that is made of a phosphate group
and two x I N
Solution
1. Developmet of microscope enabled the study of cells. Microscopes are two types light or
compound microscope and electronic microscope.
2. In a compound light microscope the high power objective lens comes close to the specimen to
magnify the image. Transmission electron microscopy (TEM) depends on the electron beam of
short wavelength to illuminate the internal structures of microorganisms. The electron beam
penetrates into the specimen and magnifies 1nm object up to 500,000X. In scanning electron
microscopy (SEM) the specimen is coated with a thin layer of heavy metal like gold or
palladium. The narrow beam of electrons probe back and forth of the metal coated specimen.
The secondary electrons that are scattered back give the image of the specimen which is
displayed on the screen.
3. According to cell theory living things are composed of one or more cells. Anton von
Leeuwenhoek (1632-1723) is considered as “Father of Microbiology”. He was the f.
In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
A. The development of the has allowed us to study cells and their pro.pdfthangarajarivukadal
A. The development of the has allowed us to study cells and their processes 1. T a. Resolution is
the ability ofamicroscope to show two objects as separate Magnification is how much larger an
object appears compared to its actual size a Light microscopes are the kind we use in lab. They
function by having visible light pass through an object, and then glass lenses enlarge the object.
b. Electron microscopes use beams of electrons. They have better resolving and magnification
capabilities that allow us to see organelles and their parts. 3. Cell Theory states that all living
things & come from other cells. This theory developed as a result of contributions of 5 people
van Leeuwenhoek- 1 microscope in the 17 century b. Robert Hooke was the first person to use
the term cell to describe the basic structure of living organisms. When observing cork he noticed
that it was full of small room like structures. These structures resembled the cells that monks
lived in thus he coined the term cell in relationship Schleiden-plants are composed ofcells to
living organisms. d Schwann-animals are composed of cells e. Virchow-cells don\'t just appear
they come from preexisting cells. B. Two major classes of cells. which is coiled in region where
the nuc leus would be if the cell had a nucleus. This group includes the archaea and bacteria have
a true nucleus which is bordered by a double membrane called the nuclear enve lop. This group
includes the protists, fungi, plants, and animals collectively known as the Eukarya.
Characteristics of eukaryot ic cells A. Cytoplasm is the space in a cell between the It contains
organelles within a fluid called B. Membrane Structure and Function 1. The serves as the border
of the cell. Its unique structure allows it to regulate what enters and exits a cell, for this reason it
is oft called the gate keeper 2. Membrane Structure pecialized lipids known as make up most of
the membrane. These structures have a or water loving head that is made of a phosphate group
and two x I N
Solution
1. Developmet of microscope enabled the study of cells. Microscopes are two types light or
compound microscope and electronic microscope.
2. In a compound light microscope the high power objective lens comes close to the specimen to
magnify the image. Transmission electron microscopy (TEM) depends on the electron beam of
short wavelength to illuminate the internal structures of microorganisms. The electron beam
penetrates into the specimen and magnifies 1nm object up to 500,000X. In scanning electron
microscopy (SEM) the specimen is coated with a thin layer of heavy metal like gold or
palladium. The narrow beam of electrons probe back and forth of the metal coated specimen.
The secondary electrons that are scattered back give the image of the specimen which is
displayed on the screen.
3. According to cell theory living things are composed of one or more cells. Anton von
Leeuwenhoek (1632-1723) is considered as “Father of Microbiology”. He was the f.
1. Jessica Díaz Rivera<br />RISE Program<br />Laboratory# 1: (Microscopy and Photomicrography)<br /> In our first laboratory this Friday Dr. Ross talked about Robert Hooke who invented the microscope. He observed materials that were in his mouth called bacteria. He saw that the box structure found in, ( the tissue) of cork looked like little prison cells and decided to name it cell. There are two types of microscopes: the scanning electron microscope (with which you can observe atoms) and the light microscope. We saw a video about corn considered the fruit that is a single grain. Inside the corn we saw the starch called endosperm contained in each kernel. The video was made possible by using an electron microscope. After the theory each group had different assignments. Our group’s theme was pond water. We had to take pond water from the fountain and prepare a blank slide, look through the microscope at the different particles or small things that we saw. We took photos with Q application and prepared a video in iphoto in order to present our findings.<br /> <br />