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TLS Online TPP Program

#Question id: 12760

Which of the examples below provides appropriate abiotic and biotic factors that might determine the distribution of the species in question?

#XL - R Botany
  1.  The amount of nitrate and phosphate in the soil and wild flower abundance and diversity
  2.  The number of frost-free days and competition between species of introduced grasses and native alpine grasses
  3.  Increased predation and decreased food availability and a prairie dog population after a prairie fire
  4. Available sunlight and increased salinity in the top few meters of the ocean and the abundance and diversity of phytoplankton communities
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TLS Online TPP Program

#Question id: 4725

#XL - T Zoology

Ptosis (droopy eyelid) may be inherited as a dominant human trait. Among 30 people who are heterozygous for the ptosis allele, 10 have ptosis and 20 have normal eyelids. What is the penetrance for ptosis?
TLS Online TPP Program

#Question id: 19514

#XL - P Chemistry

A cathode and an anode are the most common components of an electrochemical cell. Which of the following claims about the cathode is correct?
TLS Online TPP Program

#Question id: 8931

#XL - R Botany

A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the following genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny?
TLS Online TPP Program

#Question id: 19672

#XL - P Chemistry

It’s called ether when the alkyl groups connected to either side of the oxygen atom in an ether are different.
TLS Online TPP Program

#Question id: 28118

#XL - U Food Technology

The preservation technique using radiation is also known as