QUESTION 11 Which stage of the lifecycle is most predominant in ferns? Gametophy

ID: 207515 • Letter: Q

Question

QUESTION 11

Which stage of the lifecycle is most predominant in ferns?

Gametophyte

Sporophyte

Neither, they are equally predominant.

3.5 points

QUESTION 12

How might it be advantageous for pine trees to produce male cones on the tips of the branches?

The position at the end of the tree branch allows insects and animal pollinators to brush up against the male pine cone and pick up pollen.

The position at the end of the tree branch allows more wind to pass through the male pine cones to distribute pollen to the female cones.

3.5 points

QUESTION 13

How does the structure of the pollen grain relate to its function?

The “ears” function as wings that are caught by the air so that pollen can be blown to other trees.

The “ears” function as listening devices because the female pine cone emits a signal that it’s ready to be fertilized.

Like bryophytes and ferns, sperm must from the male cone to the female cone. Sperm use the “ears” as diving boards to reach the female cone.

Gametophyte

Sporophyte

Neither, they are equally predominant.

11) sporophyte

12) The position at the end of the tree branch allows more wind to pass through the male pine cones to distribute pollen to the female cones

13)The ears functions as wings that are caught by the air so that pollen can be blown to other trees.

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