A hand sanitizer was advertised to be more effective at killing bacteria than any antibacterial soap. Students were split evenly into 4 groups to test this claim. Groups 1-3 washed their hands using the assigned hand sanitizer or soap (see table) and warm water for two minutes, and then dried their hands with a paper towel. Group 4 rubbed their hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then dried their hands with a paper towel. After washing, each student’s hands were swabbed and the swab was applied to a culture plate and incubated. Finally, the bacterial cultures were counted. What are the independent and dependent variables in this experiment? What is the control group? List 3 constants. *

1. a tropical dry forest carries out more rapid nutrient cycling

answer;

-chlorine

explanation;

-toxic industrial chemicals are industrial chemicals that are manufactured, stored, transported, and used throughout the world. toxic industrial chemicals can be in the gas, liquid, or solid state.

-they can be chemical hazards (e.g., carcinogens, reproductive hazards, corrosives, or agents that affect the lungs or blood) or physical hazards (e.g., flammable, combustible, explosive, or reactive).

the right answer is mentionned in the picture.

mitosis consists of dividing a mother cell into two daughter cells. unlike meiosis, mitosis is unsexed. there's four phases in mitosis: prophase, metaphase, anaphase and telophase (each phase is represented in the picture).

mitosis or cell division allows to multiply the number of cells while preserving the quantity and the quality of the information contained in the chromosomes. the course of mitosis depends on very precise mechanisms. these mechanisms are universal, that is to say common, with a few details, to all eukaryotic organisms, animals and plants.