TLS Online TPP Program

#Question id: 8841


Adaptive radiations can be a direct consequence of four of the following five factors. Select the exception.

#Unit 9. Diversity of Life Forms
  1. vacant ecological niches
  2. genetic drift
  3. colonization of an isolated region that contains suitable habitat and few competitor species
  4. evolutionary innovation
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TLS Online TPP Program

#Question id: 4891

#Unit 8. Inheritance Biology

plantlike organism on the planet Pandora can have three recessive genetic traits: bluish leaves, due to an allele (a) of gene A; a feathered stem, due to an allele (b) of gene B; and hollow roots due to an allele (c) of gene C. The three genes are linked and recombine. A geneticist performed a testcross with an organism that had been found to be heterozygous for the three recessive traits, and she was able to identify progeny of the following phenotypic distribution (+ = wild type):

 A) Genes are in the order: a-c-b

B) Genes are in the order: a-b-c.

C) Genes are in the order: b-a-c

D) Interference is one

E) Greatest distance between gene a and b

TLS Online TPP Program

#Question id: 8857

#Unit 9. Diversity of Life Forms

Which chemical is synthesized by some sponges and acts as an antibiotic

TLS Online TPP Program

#Question id: 10323

#Unit 9. Diversity of Life Forms

If this figure is an accurate depiction of relatedness, then which taxon is unacceptable, based on cladistics?


TLS Online TPP Program

#Question id: 5221

#Unit 11. Evolution and Behavior

Unequal crossing over during Prophase I can result in one sister chromosome with a deletion and another with a duplication. A mutated form of hemoglobin, known as hemoglobin Lepore, is known in the human population. Hemoglobin Lepore has a deleted set of amino acids. If it was caused by unequal crossing over, what would be an expected consequence?

TLS Online TPP Program

#Question id: 10813

#Unit 6. System Physiology – Plant

A living cytoplasmic connection penetrate the walls between sieve tube elements and their companion cells; which are often complex and branched on the companion cell side, known as