TLS Online TPP Program

#Question id: 9182


Imagine that a deep temperate zone lake did not turn over during the spring and fall seasons. Based on the physical and biological properties of limnetic ecosystems, what would be the difference from normal seasonal turnover?

#Unit 9. Diversity of Life Forms
  1. The lake would fail to freeze over in winter.
  2. An algal bloom of algae would result every spring.
  3.  Lakes would suffer a nutrient depletion in surface layers.
  4. The pH of the lake would become increasingly alkaline.
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TLS Online TPP Program

#Question id: 23711

#Unit 8. Inheritance Biology

A single gene controls more than one phenotypic effect called___

TLS Online TPP Program

#Question id: 24531

#Unit 11. Evolution and Behavior

In some fruit-fly populations, two alleles are present at the locus that encodes ADH; Adhf, and Adhs , Female fruit flies with different Adh genotypes produce the following numbers of offspring;

Calculate the relative fitness of females having these genotypes?

TLS Online TPP Program

#Question id: 11418

#Unit 10. Ecological Principles

Use the following diagram of five islands formed at around the same time near a particular mainland, as well as MacArthur and Wilson's island equilibrium model principles


Which island would likely have the lowest extinction rate?

TLS Online TPP Program

#Question id: 21126

#Unit 12. Applied Biology

The magnetic biosensors are type of ________________ based sensors?

TLS Online TPP Program

#Question id: 15871

#Unit 12. Applied Biology

Various sterilization techniques used in plant tissue culture work;

           Sterilization technique

 

          Materials sterilized

     A) Dry heat

i) Media, culture vessels, other glass plasticwarc, contaminated cultures

 

      B) Autoclaving

ii) Heat labile compounds like GA3, ABA, zeatin, urea,·enzymes, etc.

 

      C) Surface sterilization

iii) Empty glassware, instruments like scalpels, forceps, needles

 

     D) Liquid (membrane filter of 

       0.45 μm or smaller pore size)

iv) All plant materials to be cultured