Biology, 14.10.2020 01:01 sickomode2048
Jackie read that Aloe Vera promoted healing burned tissue. She decided to investigate the effect of varying amounts of Aloe on the regeneration of planaria – a small organism. She bisected the planaria to obtain 10 parts (5 heads and 5 tails) for each experimental group. She applied concentrations of 0%, 10%, 20%, and 30% Aloe to the groups. 15 mL of Aloe solutions were applied. All planaria were maintained in a growth chamber with identical food, temperature, and humidity. On Day 15, Jackie observed the regeneration of the planaria parts and categorized development as full, partial or none.
Answers: 2
Biology, 21.06.2019 16:30
25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?
Answers: 3
Biology, 21.06.2019 19:30
Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?
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Biology, 21.06.2019 21:00
In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected
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Biology, 22.06.2019 09:00
How can an organ, such as the lungs, work for multiple body systems?
Answers: 2
Jackie read that Aloe Vera promoted healing burned tissue. She decided to investigate the effect of...
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