Trypan blue staining can be used to discriminate between viable and dead cells and determine the number of viable cells present in a cell suspension.
https://www.creative-bioarray.com/support/trypan-blue-staining-assay.htm
Answer:
Choice A, BCAD
Explanation:
Recombination frequency is a number that describes the proportion of recombinant offspring produced in a cross. In other words, it tells us how often does crossing over happen between the loci of two observed genes. The bigger the RF is, the larger is the distance between two genes. That means that genes B and D (RF 14%) are the most distant ones, and all the others are located inbetween them. You have to sketch the order of genes based on how far away they are from each other.
If you want to find out more, I recommend reading this article: https://www.khanacademy.org/science/biology/classical-genetics/chromosomal-basis-of-genetics/a/linkage-mapping
hope it helps:)
Organic farming methods enable farmers and gardeners to prepare soil in such a way that nitrogen is added naturally through nitrogen-fixing bacteria rather than nitrogen having to be added through a synthetic fertilizer. This method of growing crops saves farmers money and alleviates the problems associated with fertilizer runoff
Farmers and gardeners should use other methods to provide crops with the nitrogen they need.
Algal blooms are due to the accumulation of algae, generally Cynabobacteria and Dinoflagellates, that grow due to excess nutrients in water.
If good algae grow, they do not accumulate in the waterbodies.
Diatom Algae are good algae.
Therefore if Diatoms are grown instead of Cyanobacteria and Dinoflagellates, there would be no accumulation and no problem of algal blooms.
The answer is: In recent years, scientists have discovered fossils from long ago that glaciers have hidden
