What description explains how a flower produces a seed? (2 points) Group of answer choices

1.After the stamen produces pollen, the pollen is moved to the petal to produce a seed.

2.As pollen travels down the stamen, fertilization occurs and a seed is produced.

3.When the ovule receives pollen, fertilization occurs and a seed is produced.

4.When the stigma receives pollen, a seed is produced and then fertilization occurs.

In what part of the body does the most muscle activity happen?

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos

Which is an innovation of gymnosperms? gymnosperms are the first seed plants. gymnosperms are the first flowering plants. gymnosperms are the first vascular plants. gymnosperms are the first spore plants.