Bio help -- 2 questions! Thanks!?

1. In one species of fish, the females lay eggs that are not fertilized. The eggs hatch and develop into adult fish.
a) What is the name of this form of reproduction? (1 mark)
Parthenogenesis
b) What proportion of offspring are likely to be male? Explain. (2 marks)
Not enough information to tell. This depends on the sexual determination of the fish.
o If the parthenogenesis mechanism is "cloning" then all offspring will be female and 0% will be male.
o If the parthenogenesis mechanism is "fusion of polar body and ovum" and the fish has an XY sex determination mechanism, then all offspring will be female and 0% will be male.
o If the parthenogenesis mechanism is "fusion of polar body and ovum" and the fish has a ZW sex determination mechanism, then no offspring will be female and 100% will be male. (This is what happens in komodo dragons by the way).
o If the fish has sex determination from temperature, then the environmental temperature will determine the proportion of males and females.
o If the fish has a life cycle in which sex change occurs, then we don't know. They'll all start out as the initial sex and at some later point, change to the other.
!! Your teacher should not have asked you this question.

2. Sea anemones can reproduce asexually by budding and sexually by means of fertilized eggs, which hatch into larvae. Adult sea anemones exist only as polyps, which remain fixed in one location. Their larvae, however, are free-swimming. Explain how sexual reproduction could help a population of sea anemones overcome toxic wastespill. (2 marks)
o The larvae have a chance of drifting away and swimming away from the parental patch, and starting new populations elsewhere. The parental patch is doomed since the parent anemones can't move from the parental patch and have been doused with toxic stuff. The species survives in the new populations founded by those larvae.
!! This isn't a very good question. Adult anemone polyps don't really remain fixed in one location. Check YouTube for some time lapse videos of sea anemones moving.