science (cells)3-1 grade 6

Question Answer
what are all living things made up of? CELLS
cells- the basic unit of life
in what year did the bubonic plaque go around? X in the year 1328,killed millions X
what was the bubonic plaque caused by? X bacteria X
in what year did the potato famine happen X in the year 1845, 100,000 people died of hunger X
how come people did not know about bacteria? the organism was microscopic and people did not have as much technology
who discovered cells? robert hooke a british scientist
what did robert hooke make? a homemade microscope
why did robert hookie name cells "cells"? he named them cells because "cells" in Latin mean "little rooms"
what did robert hooke see inside of the cells? he saw inside the "little rooms" there was jucie inisde called cytoplasm
who was anton van Leeuwenhoek. ? he was a dutch merchant who created the microscope
who was the first person to see blood cells? Anton van Leeuwenhoek
what was Anton Leeuwenhoek famous for discovering? pond micro-organisms he called animalcules now called protists
who discovered the cell theroy? Matthias Schleiden & Theodore Schwann and Virchow
what is the cell theory? all organisms have one or more cells, cells are the basic unit of life, all cells come from re existing cells
what part did rudolf Virchow add to the cell theory? (3) all cells come from other cells
do animals have cell walls? no
do plants and fungi have cell walls? yes
what did anton look at? animal blood
what did Anton Leeuwenhoek notice about animal blood? he noticed that animal blood differs from animal to animal
who was the first person to see bacteria? Anton Leeuwenhoek from his teeth
what did Anton Leeuwenhoek discover about yeast? X he discovered that yeast that makes bread are single-celled X
Who was Schwann he studied animals and concluded that all animal tissues have cells
why cant you see cells with a naked eye? cells are microscopic
why is an egg yolk able to be such a large cell? because it does not need to take in nutrients
what happens when the cell gets bigger? when the cell gets bigger the more food it needs and gets rid of more waste
why are cells small? they are limited by their surface are to volume ratio -they take in food then gets rid of the waste so the cell stays small
when cells volume increases surface area grows
what happens when cells get too much bigger- they cant take in as much food this is due to surface area to volume ratios
what are three things hooke looked at? house fly eyes,feathers,fish scales
hooke determined that plants have cells but not animals why is this? animals dont have cell walls so they hard to see
what did anton see swimming around in the pond water ? Protists -he named these creaters animalcules
what does animalcules mean? little animals
what do we can animalcules today? protists
what 3 things did anton look at? animal blood,bacteria,yeast
what are all cells surrounded by? cell membrane
what is a cell membrane? a protective layer that covers the cell(acts like a barrier)
what does the cell membrane do? it seperates the cell from the enviernment
what does the cell membrane control? it controls what goes in and out of the cell
what is cytoplasm? it is a clear fluid inside evrery cell
organelles- are structures that perform specific functions within the cell
do different cells have different organelles true or false? true
where are organelles located they float in the cytoplasm or are attached to membranes inside the cell
DNA= genetic material that all cell have which carries info to make new cells and organisms
where is the DNA in a eukaryotic cell- in the nucleus
eukaryotic cells have______. nucleus
do red blood cells have DNA? X no they lose their DNA when they mature X
what are the two kinds of cells? prokaryotic and eukaryotic
what 4 things do all cells have DNA (genetic material),organelles,cytoplasm and cell membrane
what is the most Common prokaryote? bacteria
bacteria- is the smallest cell known
where does bacteria live almost everywhere
what are ribosomes- tiny round organelles made up of protein and other material
how does the cell wall help the bacteria? it helps mantain shape and protect the cell
what are some example of where bacteria lives? soil, water, in or on organisms, skin, teeth, digestive system
what are the three types of archaea heat loving, salt loving, methane making
What is the biggest difference between archaea and bacteria? where they live.
two types of cells prokaryotic and Eukaryotic
two types of Prokaryotic cells archaea and bacteria
four types of Eukaryotic cells animal, plant, fungi, protist
Is Archaea single celled? yes
does archaea have ribosomes? yes
true or false: archaea has a nucleus false
what are the three types of archaea bacteria? salt loving, methane making & heat loving
true or false: are prokaryotic cells single-cellular true
do prokaryotic cells have nucleus ? no they do not have nucleus
prokaryotic cells- don't have a membrane bound organelles, but have DNA
what are 2 things that prokaryotic cells and eukaryotic cells both have? -they both have DNA and one or more cells
are eukaryotic cells multi -cellular? true or false: true
eukaryotic cells- have nucleus, have membrane and has DNA
what is the smallest unit that can perform all the processes necessary for life is a cell
what kind of cells have cell walls? everything but animals. for example, plants ,fungi & prokaryotic
why can a chicken egg grow so large? it does not take in nutrients
what limits cells to a very small size? the surface area-to-volume ratio of the cell
how could you calculate the surface area-to-volume ratio? divide the total surface area of the cell by the cells volume
what parts do all cells have? DNA , organelles, cytoplasm and cell membrane
what are prokaryotes ? they are organisms that consist of single cell that does not have a nucleus or membrane bond organelles
what is 1 difference between archaea and bacteria? where they are found in different places
how do eukaryotes compare in size to prokaryotes? eukaryotes are about 10 times larger
what does eukaryotes have that prokaryotes do not have? cells with a nucleus
which of these words describes humans? a)eukaryote
the correct answer A)
what does multi-cellular mean many cells

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