Survival And Response Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Give one advantage of taxis to organisms.

A

to avoid competition, to find a mate, increase dispersal, to avoid predators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Suggest two advantages of simple reflexes.

A
  1. Rapid;
  2. Protect against damage to body tissues;
  3. Do not have to be learnt;
  4. Help escape from predators;
  5. Enable homeostatic control.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Use your knowledge of indoleacetic acid (IAA) to explain the curved growth of a shoot (3)

A
  1. Tip produces IAA;
    Accept source/release for produces but ignore contains/stores IAA.
  2. IAA diffuses (into shoot);
    Accept auxin for IAA.
    Accept IAA diffuses down.
  3. (More) elongation of cells on one side (than other);
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Explain how the uneven distribution of IAA causes a root to bend (2)

A
  1. (IAA) at bottom of root/where AII concentration high inhibits expansion/elongation (of cells);
  2. (IAA) at the top of the root/where IAA concentration low leads to expansion/elongation (of cells)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly