Answer:
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Hypothesis: There will be a significant difference between the tadpole weight gain before applying the commercial fish-based diet and the measures after some diet to the diet.
Null hypothesis: There is no significant difference in the means of the tadpole weight before and after the commercial fish-based diet.
Alternative hypothesis: There is a significant difference in the means of the tadpole weight before and after the commercial fish-based diet.
The independent variable is the amount of the commercial fish-based diet given to tadpoles, since it is the variable that is controlled in the experiment. The dependent variable is the tadpole weight gain, since it is the variable that is investigated and measured.
The gain or not in tadpole weight is the variable that we would use to know if the change in diet affects the size of the tadpole.
Explanation:
Answer: shape- torpedo shaped , Fins- dorsal and side fins
Explanation:
Dolphin is a part of the Cetacean family, which also includes whales and porpoises while sharks are cartilaginous fishes of the class Chondrichthyes which means they have skeletons that are made of cartilage rather than bone. Shark and dolphin tends to look alike although the are not related but because they share the same habitat and have some similar body features such as Body shape, fin and tail they are mostly grouped together as the same.
natural selection favored a particular shape over other shapes for rapid movement through the seas and fin which made them a predator in the ocean this makes them look similar.
Answer:
What part of the brain controls essential survival functions. The brain stem.
Answer:
The placenta serves as an interface between the mother and the developing fetus and has three main jobs: Attach the fetus to the uterine wall. Provide nutrients to the fetus. Allow the fetus to transfer waste products to the mother's blood.
Explanation: