Question

sample of recall - type of questions: 1. which of the following scientists provided evidence in favor of the concept of spontaneous generation? redi spallanzani buchner needham pasteur 2. all of the following are characteristics of viruses except: they are obligatory parasites. they are acellular. they are smaller than prokaryotic cells. they are visible with a light microscope. they are composed of genetic material and protein. 3. which of the following is a particle found in the nucleus of an atom and which has no electrical charge? isotope neutron electron element proton

Explanation:

1. Needham conducted experiments that he believed supported spontaneous generation. Redi, Spallanzani, and Pasteur provided evidence against it. Buchner's work was on cell - free fermentation.
2. Viruses are too small to be seen with a light microscope. They are obligatory parasites, acellular, smaller than prokaryotic cells, and composed of genetic material and protein.
3. Neutrons are particles in the nucleus of an atom with no electrical charge. Isotopes are different forms of an element, electrons are outside the nucleus, elements are made of atoms, and protons have a positive charge.

Answer:

1. Needham
2. they are visible with a light microscope.
3. neutron