Active transport: Movement of materials across a membrane that requires an input of energy from a cell. Movement of material against the concentration gradient (from low concentration to high concentration)
Passive transport: Movement of materials across a membrane that does not require energy from the cell. Movement of material against the concentration gradient (from high concentration to low concentration)
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Answer:
possible differences resulting from using two different breeds of dog
Explanation:
The question above presents a scientific experiment carried out by students Pablo and Johanna from the biology course. In this experiment, they both compare the results of different diets on their dogs. Up to this point, the experiment was being established correctly, since the variables independent (the composition of the dogs' diet) and dependent (the influence of the diet on the dog) were defined. However, these students made a mistake in using dogs of different breeds.
In an experiment, everything must be very controlled and the treatments must be exactly the same. In the above case, the dogs are the treatments and the fact that they belong to different breeds, means that the results of the experiments can present significant differences, not providing a correct conclusion of the experiment.
Answer:
Tissues may be defined as the group of similar cells that combine together to form a similar functions. Four main types of tissues are epithelial tissue, connective tissue, muscle tissue and nervous tissue.
Epithelial tissue are presents on the surface, body lining and lining of mouth and internal organs. The cells of epithelial tissue are one layer thick only. This means epithelial tissue that have the function of absorption are usually thick and has the large surface area that increases the rate of absorption.
False. Their exoskeletons are made of silica.
Answer:the vascular tissue in plants that conducts sugars and other metabolic products downward from the leaves.
Explanation:
