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TLS Online TPP Program

#Question id: 13168

Use the following diagram from the text showing the spread of the cattle egret, Bulbulcus ibis, since its arrival in the New World, to answer the following question.


How would an ecologist likely explain the expansion of the cattle egret?

#Unit 10. Ecological Principles
  1. The areas to which the cattle egret has expanded have no cattle egret parasites.
  2. Climatic factors, such as temperature and precipitation provide suitable habitat for cattle egrets.
  3. There are no natural predators for cattle egrets in the New World, so they continue to expand their range. 

  4. A habitat left unoccupied by native herons and egrets met the biotic and abiotic requirements of the cattle egret transplants and their descendants.

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TLS Online TPP Program

#Question id: 27358

#Unit 6. System Physiology – Plant

Choose the correct statement regarding singlet and triplet state
1. singlet state is short lived, net angular momentum and spin quantum number, s is zero
2. singlet state is long lived, net angular momentum and spin quantum number, s is one
3. Triplet state is long lived , net angular momentum and spin quantum number, s is one
4. Triplet state is short lived net angular momentum and spin quantum number, s is zero
TLS Online TPP Program

#Question id: 27374

#Unit 13. Methods in Biology

An aqueous solution contains two compounds X and Y. This solution gave absorbance values of 1.0 and 0.4 at 220 and 280 nm, respectively, in a 1 cm path length cell. Molar absorption coefficients (ε) of the compounds X and Y are as shown in the table below.

The concentration of Y in the solution is___________ mM.
TLS Online TPP Program

#Question id: 27375

#Unit 1. Molecules and their Interaction Relevant to Biology

An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct?
TLS Online TPP Program

#Question id: 27376

#Unit 1. Molecules and their Interaction Relevant to Biology

The number of neutrons is equal to
TLS Online TPP Program

#Question id: 27377

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the number of electrons, protons and neutrons in 1 mole of 16O−2 ions.
TLS Online TPP Program

#Question id: 27378

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statements
(i) Atomic number = number of protons + number of electrons
(ii)Mass number = number of protons + number of neutrons
(iiiAtomic number = number of protons + number of neutrons
(iv)Atomic number = number of protons = number of electrons