Hairy ears are inherited as a Y-linked trait. A man with hairy ears has a daughter who has a son with a man who does not have hairy ears. What is the probability that the hairy-eared man's grandson has hairy ears?

zero

Explanation:

Y-linked traits do not occur in females as they do not possess the Y chromosome, and occur in all male descendants of an affected male. Since the affected grandfather produces  daughter. She is unaffected and then mates with an unaffected male that does not have hairy hairs. The son produced between them will not have hairy hairs.

If the grandfather had sired a son, his son will be affected and then the son can pass on this trait to his own son.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)