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english 7 > science 3 > Flashcards

science 3 Flashcards

1
Q

are all cells shaped the same way? why or why not?

A

no because they all have different jobs

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2
Q

name all three statements of the cell theory

A
  1. all living things are made of one or more cells
  2. cells are the smallest unit of life
  3. new cells come from pre existing cells
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3
Q

what does a cell membrane do?

A

controls the substances that enter and exit the cell

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4
Q

what do ribosomes do?

A

they make proteins

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5
Q

what do Golgi apparatus do?

A

sorts and packages chemicals in the cell

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6
Q

what does a cytoskeleton do?

A

its the internal support structure if the cell

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7
Q

what does cytoplasm do?

A

its fluid that fills the inside of the cell and supports organelles

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8
Q

what does mitochondrion do?

A

provides energy for the cell; makes ATP

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9
Q

what do Lysosomes do?

A

recycles material’s in the cell

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10
Q

what does a nucleus do?

A

there the control center of the cell; contains DNA

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11
Q

what does a nucleolus do?

A

it makes ribosomes

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12
Q

what does a endoplasmic reticulum do?

A

workspace for chemical reactions; can be rough or smooth

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13
Q

name four macromolecules that make up all living organisms

A

carbo hydrates
lipids
proteins
nucleic acids

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14
Q

RNA and DNA are examples of what macromolecule

A

nucleic acid

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15
Q

which macromolecule provides a quick energy source

A

carbohydrates

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16
Q

which macromolecule uses large 3D molecules that are used mostly to build and cell products

A

proteins

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17
Q

which macromolecule provides protection and insulation

A

lipids

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18
Q

what is the chemical formula for water

A

H2o

19
Q

what percent of the body us made up of water

A

70%

20
Q

what is diffusion?

A

substances move from an area of high concentration to low concentration

21
Q

does food coloring diffuse better when its hot or cold and why or why not.

A

hot because molecules move faster

22
Q

make sure to know the difference between endocytosis and exocytosis

A

yup

23
Q

what two substances do plants take in to preform photosynthesis?

A

water and carbon dioxide

24
Q

how does co2 get into the plant?

A

stomata (under the leaves)

25
Q

how does water get into a plant?

A

the roots

26
Q

what is the name of the sugar plants make during photosynthesis

A

glucose

27
Q

what substance does a plant give of as a waste product of photosynthesis

A

oxygen

28
Q

what is the name for the process by which cells divide to make exact copies of themselves

A

mitosis

29
Q

which stage of the cycle is the longest-interphase or mitosis

A

interphase

30
Q

interphase is divided into three phases. in which part of interphase is DNA copied?

A

s phase

31
Q

name in order the steps of mitosis

A

PMAT
prophase anaphase metaphase telophase

32
Q

look at photos of the stages of mitosis

A

will do!

33
Q

what are the red x’s or lines in the middle of the cell

A

chromosomes

34
Q

name for reasons why cells need to divide

A

to big to absorbed nutrients
worn out and need replacement
replace damaged tissue
needs to reproduce

35
Q

what are the cells called that finished mitosis but do not have a job

A

stem cells

36
Q

give two examples of blood cells that can be produced from stem cells in bone marrow.

A

red blood cells and white blood cells

37
Q

how can you tell prokaryote from a eukaryote

A

eukaryotic is multicellular and prokaryotic is single cellular

38
Q

which prokaryote looks like little bean’s

A

bacteria

39
Q

cells are organized into what?

A

tissues

40
Q

tissues are organized into what?

A

organs

41
Q

what are organs organized into?

A

systems

42
Q

give 5 examples of human body sytems

A

digestive, raspatory, immune, skelatory, nervouse

43
Q

name two systems that are found in plants

A

root and shoot

english 7 (7 decks)

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