A flowering plant obeys Mendelian genetics where the yellow flower is dominant over pink flowers. You are given a yellow flowering plant.
What type of plant would you use to perform a test-cross with this plant to determine its genotype?

a) True breeding yellow flowering plant
b) F1 generation plant
c) True breeding purple flowering plant
d) True breeding pink flowering plant

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

When an object is moving away from you while still making a sound, the pitch of the sound is perceived to a. lower b. unchanged c. fluctuating d. higher

As a result of climate change earths temperature is rising and sea ice is melting what is a likely effect? answer : populations of walruses and polar bears will decline