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During an ecological field work, a group of students caught 240 grasshoppers, marked them and then released them back to the study area. After one...

      

During an ecological field work, a group of students caught 240 grasshoppers, marked them and then released them back to the study area. After one day they caught 160 grasshoppers and found that 40 were marked. Using the formula; P =F.C.M X S.C S.C.M Where P =Total population F.C.M = First capture marked S.C = Second capture S.C.M = Second capture marked.
a) Identify the method used to capture the grasshoppers
b)Name the instrument and chemical the students used to collect and mark the grasshoppers
c)State any one assumption the students made during the field work
d) The students observed the organisms and placed them into their correct phylum and class. Name the phylum and class

  

Answers


Davis
a) Capture and recapture method;
b)-instrument-Sweep net
-chemical-Nail vanish/indelible ink
c)- No migration/No movement into and out of the study area;
- There is even distribution of the grasshoppers in the study area;
- There is random distribution of the grasshoppers after the first capture;
- No birth or deaths of grasshoppers during the field study
d)i)Phylum- Arthropoda;
ii)Class-Insecta
Githiari answered the question on January 17, 2018 at 09:39


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