100 centimeters make up one meter
A CONSUMER gains its energy by eating something else.
Answer:
Explanation:
They could have conducted the experiment at least thrice for each sample (sand and water) OR done the experiment once but at least in triplicates (i.e obtained six identical 1000 ml beakers; with three beakers for each sample, all ran at once). Also, the same volume of sand put in three of these beakers should be the same volume of water put in the remaining three beakers as rightfully done in the experiment.
The essence of conducting the experiment at least thrice for each sample (sand and water) or done the experiment once but at least in triplicates is to be able to subject there recorded data to statistical analysis; this affords them the opportunity to remove/reduce all forms of error the experiment could have been exposed to during the course of the experiment.
Possible errors include (but not limited to) error due to parallax while taking the volumetric measurements and timing errors.
Answer:
Antigen, stabilizers, surfactants, diluents, preservatives
Explanation:
- Antigen: This is part of the protein structure virus or part of its genetic material. These parts are active. But sometimes, the inactivated form of the virus is also included in the vaccine.
- Stabilizers: Avoid other chemical reactions occurring in the interior of the vaccine.
- Surfactants: They prevent the occurrence of sedimentation and agglutination of the elements inside the vaccine.
- Diluent: Used to dilute the vaccine in an appropriate concentration before being used.
- Preservatives: As the word says, preservatives avoid any possible contamination of the vaccine. These elements´ use depends on the doses prepared. If it is only for one-person use, then they are not needed. But if the doses are to be used by more than one person, they need preservatives because once the vaccine is opened it is vulnerable to contamination.
