MajaKazazic
Uploaded on Oct 29, 2019
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Biology Homework Help
Biology
1
What is Biology?
• It is the study of life.
• Branch of science
– A way of understanding nature.
• A human endeavor
– An attempt to understand, explain, integrate and
describe the world of living things.
Major Themes in Biology
• Evolution by Natural
Selection
• Inheritance
• Cells
• Biological Classification
• Bioenergetics
• Homeostasis
• Ecosystems
Characteristics of Life
16. MGreotawbtohlism
27. SCpeellcuifilacr ocrogmanpiozasititioonn
83. HRoempreoodsutcatisiosn
94. RMesopvoenmseivnetness
5. Adaptation
Branches of Biology
1. Zoology- the study of animals
2. Ichthyology- the study of fish
Why Important? Fish are indicator species.
Alert humans to potential environmental
problems
What are cells?
Cells are made up of many parts and each one of
them has its own function. Online Biology
Assignment help provides an idea of structure of
human cells and also the two types of cells.
Nucleus, Cytoplasm, Cytoskeleton, Endoplasmic
Reticulum, Golgi apparatus, Lysosomes and
peroxisomes, Mitochondria, Plasma membrane,
Ribosome are called the structure of the cell.
What are the types of cells?
There are two categories of cells. One is Eukaryotes
and the other is Prokaryotes. Eukaryotes cells can
be seen in humans, plants and animals. Prokaryotic
cells are singled celled organism and seen in
bacteria.
The basic difference between the two is eukaryotes
consist of nucleus in which there are cell
membranes, cytoplasm, ribosome and DNA but in
prokaryotes there is no nucleus.
What are the functions of these components?
Plasma/Cell Membrane:
A plasma or cell membrane protects a cell from
harmful elements. It also helps to create a
passage for different elements to move in or out
of the cell body.
Cytoplasm:
A cytoplasm helps to remove waste in the cell. It
also helps to increase metabolism in the cell.
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