1
Q
why is hydrochloric acid used?
A
softens and loosens the root tissues
2
Q
why is a stain used?
A
stain chromosomes so they are visible
3
Q
why is a mounted needle used?
A
to lower coverslip and prevent air bubbles under cover slip
4
Q
why is root tip used?
A
the growing region, so where mitosis is occurring
5
Q
why do you press down firmly on coverslip?
A
to get a thin layer of cells so light can pass through
6
Q
when counting cells what should you do to ensure your count is accurate?
A
examine large number of fields of view so. many cells, to ensure representative sample
biology paper 2
flashcards
Decks in class (13)
# Cards
-
17 inherited change24
-
11 photosynthesis25
-
12 respiration22
-
13 energy and ecosystems33
-
19 populations in ecosystems33
-
18 populations and evolution11
-
maths skills7
-
15 nervous coordination43
-
14 response to stimuli48
-
16 homeostasis17
-
20 gene expression39
-
21 DNA technology38
-
required practical6
