1. When planting trees, One must choose the seeds that best suit the season and the soil. What Characteristic of seed is not good for planting? A. Mature
B. Good Quality Mother
C. Young
D. Without Blemish

2. How much soil consists a rich soil?

A.40 %
B.30 %
C.20 %
D.10 %

3. What substance is in the soil to prepare it for planting?

A. Compost
B. Phosphorus
C. Pot. assium
D. Fertilizers

4. On what time of the day do you have to water the plants during the dry
months?

A. Before sunrise B. After Sunset C. After sunrise D. Before sunset

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