Biology Answers

Number of bacteria in the soil is not evenly distributed. Explain the major factors which account for this uneven distribution

Without the vital processes of the biological activity of soil biota, the soil would become a repository of dead plant remains. True/False. Discuss your answer.

Actinomycetes are usually classed within the same taxonomic family as bacteria but in many aspects of their morphology and growth patterns resemble fungi. Explain.

The extant group likely to be the most closely related to the basal chordates are the echinoderms because

a. There is direct fossil evidence for a lineage from sea stars to tunicates

b. Tunicates are advanced echinoderms
c. Early embryonic development of echinoderms is similar to that of chordates

d. Although there are few similarities between echinoderms and chordates, there are even
fewer between chordates and any other group

e. New molecular evidence shows they are nearly identical at the rRNA level

List six disadvantages of the domestication of ruminants

List the different forms of permanent animal identification available

Why is permanent animal identification important?

Explain the difference between animal abuse and animal cruelty

single species may give rise to a diverse set of species in the process of

1. Pseudomonas putia is thought to degrade hydrocarbons due to the fact that it harbours a TOL plasmid. To verify this assertion, a student was tasked to isolate and grow this soil-dwelling bacteria and to also isolate the plasmid from the microbe. The TOL plasmid is also intended to be used as a cloning vector.
A. Elucidate two physical properties that will enable you to isolate TOL plasmid from the chromosomal DNA of the bacteria.
B. Describe an appropriate method you could use to isolate TOL plasmid from the bacteria.
C. During the isolation of TOL plasmid from Pseudomonas putida, it was observed that the concentration of the plasmid DNA per 50 mL of sample was extremely low. Describe a technique you could employ to increase the concentration of the TOL plasmid.
D. Demonstrate a procedure that you could adopt to restrict or digest the TOL plasmid.
E. How would you ascertain if your restriction experiment was successful?