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TLS Online TPP Program

#Question id: 12776

Which of the following is an incorrect statement about the regulation of populations?

#Unit 10. Ecological Principles
  1. The logistic equation reflects the effect of density-dependent factors, which can ultimately stabilize popula- tions around the carrying  capacity.
  2. Density-independent factors have an increasingly greater effect as a population's density increases. 
  3. High densities in a population may cause physiological changes that inhibit reproduction.
  4. Because of the overlapping nature of population-regulating factors, it is often difficult  to precisely deter- mine their cause-and-effect  relationships.
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TLS Online TPP Program

#Question id: 19002

#Unit 13. Methods in Biology

Which of the following types of chromatography involves the separation of substances in a mixture over a 0.2mm thick layer of an adsorbent?
TLS Online TPP Program

#Question id: 28354

#Unit 5. Developmental Biology

The following statements were made regarding the patterning of anterior-posterior body plan of Drosophila:

A. Mutant bicoid mRNA that leads to the deletion of head and thorax

B. bicoid mutant phenotype expressed  two telson phenotype

C. the Bicoid protein activates the zygotic expression of the hunchback gene

D. the bicoid mRNA is represses the hunchback mRNA

Which one of the following options represents all correct statements as made above?
TLS Online TPP Program

#Question id: 22938

#Unit 5. Developmental Biology

Genes that regulate flowering, have different transcription factors and functions:
 
Choose correct match:
TLS Online TPP Program

#Question id: 32296

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the structure shown
TLS Online TPP Program

#Question id: 2522

#Unit 2. Cellular Organization

The diversity of roles played by microtubules largely results from the diversity of tubulin isoforms that make up the filaments. What accounts for the diversity of roles played by microfilaments?