Jackie read that aloe vera promote healing of burned tissue. she decided to investigate the effect of varying amounts of aloe vera on the regeneration of planaria (a freshwater flatworm), regeneration is the process of growing back a lost body part. jackie bisected (cut in half) five planaria to obtain 10 parts (5 heads and 5 tails) for each experimental team. she applied concentrations of 0%, 10%, 20%, 30%, and 40% aloe vera to the teams. fifteen milliliters of aloe vera solutions were applied. all planaria were maintained in a growth chamber with identical food, temperature, and humidity. on day 15, jackie measured the amount of regeneration of the planaria parts and categorized regeneration as full, partial or none.1. what is the hypothesis (if/then statement) for this particular experiment? 2. what are the dependent variable and the independent variable? 3. what controls are they using in their experimental setup? 4. when they performed the experiment, they collected the data shown below: percent aloe vera count of regenerated planaria0% 210% 520% 730% 35. should the hypothesis be supported or rejected based on the experiment? why?

{answer found. it's (3 ) }which statement describes the cell cycle? (1)the cell cycle is a process in which one cell divides into four genetically different cells. (2)the cell cycle is a process in which one cell divides into two genetically different cells. (3)the cell cycle is a process in which one cell divides into two genetically identical cells. (4)the cell cycle is a process in which one cell divides into four genetically identical cells.

What is the relative placement of the moon, earth and sun during a lunar eclipse? the sun, earth and moon are aligned with the earth in the middle and the moon furthest away from the sun. the moon and sun are aligned with the earth at right a right angle to the moon. the sun, earth and moon are aligned with the moon in the center and the earth furthest away from the sun. the earth and sun are aligned with the moon is at a right angle to earth. 2. choose the best explanation of a partial solar eclipse. during a new moon phase there is usually a partial but not total eclipse. the earth only partially covers the sun during the eclipse. the moon only partially covers the sun during the eclipse. the moon only partially covers the sun during the eclipse. the moon's phase is full and blocks out most but not all of the sun. 3. what are conditions necessary for a total solar eclipse? moon in perigee orbit, earth a direct line between sun and moon, moon in full moon phase moon in perigee orbit; moon moves a direct line between sun and earth; moon in full moon phase moon in perigee orbit; moon moves a direct line between sun and earth; moon in new moon phase moon in apogee orbit, moon moves a direct line between sun and earth; moon in new moon phase 4. what causes a partial lunar eclipse? only the penumbra of the earth passes across the moon creating a circular shadow. the earth's umbra fits inside the moon creating an illuminated ring known as a annular eclipse. a partial eclipse causes the moon to turn reddish from the refraction of the sun's ray through the earth atmosphere. the earth's umbra only cover a part of the moon causing a circular shadow to pass across it.

Which of the following is true about the introduction of a non-native species to an environment? (a) they usually adapt quickly so they can have a positive affect on the environment. (b) they can disrupt the environment and cause much damage and devastation to native species. (c) they usually become predators in a food chain and to keep prey populations under control. (d) because the native species are better-adapted to the environment, the non-native species always end up dying out.