What is a covalent bond?

a. a bond in which electrons are transferred
b. a bond in which electrons are destroyed
c. a bond in which electrons are created
d. a bond in which electrons are shared

It's choice d. a bond in which electrons are shared

answer; a male inherits only one allele of the x-linked gene controlling hair color;

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)