b5 Flashcards
1
Q
4 physical animal defences?
A
Mucus in lungs
skin
Blood clotting
acid in stomach
2
Q
Immune defence? (1)
A
antibodies
3
Q
HIV spread by? (3)
A
Sharing needles
Unprotected sex
Unscreened blood transfusion
4
Q
Bacteria divide by? 2
A
Binary fission using mitosis
5
Q
Why is it useful for scientists to grow bacteria in large numbers?
A
So we can see them
6
Q
How is rose black spot spread? 2
A
wind and water
7
Q
2 consequences of mineral deficiency in plants?
A
Nitrate ions needed for growth and protein synthesis, magnesium makes chlorophyll
8
Q
3 plant defences and examples
A
Physical- wax cuticle, cellulose cell wall
Chemical- antibacterial, poisons
Mechanical- thorns, drooping when touched.
