Based on the broth left on an open flask experiment, wherein the boiled broth was placed in two flasks (one flask with straight neck and the other flask has a bent neck) and exposed to open air at room temperature for several weeks.
The broth within the straight neck flask has changed its appearance. It became discolored and cloudy. Whereas, the broth in the bent neck open flask still remains the same.
These results would then support the conclusion that germs in the air were able to fall unobstructed towards the straight neck flask and contaminate its contents. While, the bent neck of the 2nd open flask acted as a trap for the germs, preventing the germs from contaminating the broth. Further emphasizing that germs can only come from other germs and not from spontaneous generation.
For the first question, the answer is C. green because a phenotype is the physical characteristics of an organism that can be seen. Of the options given, only green is a characterisitc that could be seen.
For the second question, the best answer is A. somatic because somatic mutations occur in the gametes.
Answer:
Clean energy sources have minimal impact on the environment and come from what resources?
Wind energy (renewable energy) is one of the cleanest and safest energy source which has minimal impact on the environment and it comes from wind
Explanation:
<span>The two different kinds of t-cells are the Helper t-cells and the killer t-cells.
T cells are named T cells after the thymus, an organ situated under the breastbone. They are produced in the bone marrow and later move to the thymus where they mature. Helper T cells have a primary tsak of activating the B cells and killer T cells. The killer T cells are specialized in attacking cells of the body infected by viruses and sometimes also by bacteria. Additionally, they can attack cancer cells.</span>
When cleaning up water pollution in a large lake or river, it is important to clean up the entire watershed. It<span> is a basin-like landform defined by highpoints and ridgelines that descend into lower elevations and stream valleys. This is because pollution can be transfered to other areas of the lake or the river when this part is not cleaned well.</span>
