Answer:
1. Natural
2. Natural
3. Natural
4. Manipulative
5. Manipulative
6. Manipulative
7. Natural
Explanation:
In a natural experiment, the researcher can specify that any proposed health implications could be due to exposure to the toxic chemical, but proving its direct causation is difficult. Natural experiments are majorly fixed to promoting correlation, unlike the manipulative experiments which usually strongly reveals causation.
Manipulative experiments changes the amounts of a predictor factor and estimates how one or more variables acts to these changes. It is employed in a test cause-and-effect. It cannot be used for large experimental scales as they are for small spatial scales experiments.
Natural experiments makes use of an observational study on natural variation in the variable of interest. It is used for large spatial and temporal scales without the need for manipulations but cannot be used for the direction of cause-and-effect.
J is right atrium. Blood coming from systemic organs.
G is right ventricle. blood going to lungs.
C is left atrium. Blood coming from lungs.
F is left ventricle. Blood going to systemic organs.
<span>Answer:
At first, the Earth's surface was for the most part liquid shake that steadily cooled through the radiation of warmth into space. The antiquated environment was made for the most part out of water (H2O), carbon dioxide (CO2) and monoxide (CO), sub-atomic nitrogen (N2) and sub-atomic hydrogen (H2), and hydrogen chloride (HCl) outgassed from liquid shake, with just hints of receptive sub-atomic oxygen (O2). This hot air was rich with water discharged from hydrated minerals and cometary impactors (David Shiga, New Scientist, November 5, 2010; and de Leeuw et al, 2010). As the Earth kept on cooling from Years 0.1 to 0.3 billion, an exuberant rain fell that swung to steam after hitting the still hot surface, at that point superheated water, lastly gathered into hot or warm oceans and seas above and around cooling crustal shake leaving dregs. Now and again, be that as it may, an extensive space rock or comet would strike the planet which remelted crustal shake and transformed seas once again into hot fog. In the end, a stable rough outside layer may have created between Years 0.2 and 0.4 billion (see J. Bret Bennington's exchange of reused zircons (precious stones of zirconium silicate) from the stones of western Australia in the Hadean Eon and the January 11, 2001 declaration of zircons discovered north of Perth that give off an impression of being 4.4 billion years of age), secured and encompassed by soupy water that was at that point rich with natural mixes from interstellar space.</span>
The correct answer to the question stated above is letter D. <span> head, thorax and abdomen.
The </span><span> head, thorax and abdomen are the </span><span>three main body segments in arthropods.
>Arthropods </span><span> are the largest animal phylum which includes insects, spiders, crustaceans, and others. </span>
