The correct answer is letter A. The disk soaked in distilled water is the controlled variable because it is the only differential factor from all of the other variables which are all disinfectants. Controlled variables are elements that are not changed throughout the experiment. When something is unchanged it is better for scientists to analyze the relationships of other variables better.
Answer;
The answer is A. Gametes
Explanation;
Both sperm cells and egg cells are gametes that are both products of meiosis type of cell division. Which means they are haploid,n, they have have number of chromosomes as the normal cells. Gametes are haploid , meaning that they ave just one complete set of chromosomes. Diploid cells are the body cells other than the gametes that have two copies of each chromosome.
Answer:
well from what i can see based on the data in the graph is that, since the accidental introduction of species 3 the population of the other 2 species has decreased quite a bit. While you can also observe that the population of population 3 continues to grow.
This suggests 3 possibilities to me
possibility 1. species 3 is consuming leaves just like the other 2 species causing a scarcity in food.
possibility 2. species 3 is consuming the other 2 species causing the decrease in population.
possibility 3. species 3 and the other species may be fighting over shelter, food, or water, causing more lizard fatalities.
