variation core questions Flashcards
(26 cards)
what are some of the possible causes of variation between living things
differences in the genome
differences in the environment
what is discontinuous variation
this is where the differences fit into one category or another e.g. blue eyes or green eyes
what is continuous variation
this is where the differences can have a range of values e.g. height
what is variation
differences in characteristics between living things
state the function of the nucleus of a cell
contains DNA and controls the function of the cell
state the function of the ribosome of a cell
where protein synthesis occurs (where proteins are made)
what is the name of the male sex cell
sperm cell
what is the name of the female sex cell
ovum (egg cell)
state two adaptations of ovum cells
contains half of the DNA
lots of cytoplasm
state three adaptations of sperm cells
tail
contains half of the DNA
lots of mitochondria
state the function of ovum cells
carry female genetic information
state the function of sperm cells
carry male genetic information
reorder the following in increasing size order:
organ
cell
tissue
organ system
organism
organelle
organelle
cell
tissue
organ
organ system
organism
define gamete
sex cells
define fertilisation
nucleus of male and female sex cell joining
state three things that plants compete with each other for
light
space
water and mineral ions
where is the genetic material found in a cell
the nucleus
state three things animals compete with each other for
mates
territory
food
is this statement true or false
harry inherited half of his genome from his mum and half from his dad
true
how many chromosomes are there in sperm and egg cells
23
how many chromosomes are there in human body cells
46
which chemical makes up the genetic material in a cell
DNA
is DNA alive
no
what is the shape of a DNA molecule
double helix
