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- Question 1 of 20
The evolution of the amniotic egg in reptiles allowed them to:CorrectIncorrect
- Question 2 of 20
Which of the following phyla are most closely related to chordates ?CorrectIncorrect
- Question 3 of 20
Limb lengths were measured for 50 individuals from a population of lizards and the sample variance was calculated to be 64 cm2. The standard deviation for this sample is ______ cm. (Use decimal notation, not fractions or percentage) (read cm2 as cm square)CorrectIncorrect
- Question 4 of 20
Most terrestrial ecosystems have a pyramidal structure of standing biomass across trophic levels where biomass of producers > primary consumers > secondary consumers > tertiary consumers. However, some aquatic ecosystems have an inverted pyramidal structure where the standing biomass of producers < primary consumers. An explanation for this is:CorrectIncorrect
- Question 5 of 20
In an experiment, a PhD student found that the traits, flower colour and seed size, did not follow Mendel’s Law of Independent Assortment. A possible explanation for this observation is:CorrectIncorrect
- Question 6 of 20
Which of the following invertebrates has the lowest gut length:body length ratio?CorrectIncorrect
- Question 7 of 20
Allopatric speciation occurs when two populations diverge because of geographical separation. Rates of allopatric speciation are likely to be higher in:CorrectIncorrect
- Question 8 of 20
For nearly 200 years, biogeographers have noted that the tropics have more terrestrial species than temperate regions. Which of the following is NOT a plausible explanation for this pattern?CorrectIncorrect
- Question 9 of 20
If the rate of non-synonymous substitution at a locus exceeds that of synonymous substitution, then:CorrectIncorrect
- Question 10 of 20
There are N individuals in a haploid population. At a given locus, there are 2 alleles, AL1 and AL2. The number of copies of allele AL1 is Z1, and the number of copies of allele AL2 is Z2 in the population. What is the frequency of allele AL2?CorrectIncorrect
- Question 11 of 20
According to Hamilton’s Rule, an altruistic act will spread in a population due to kin selection, when B/C > 1/r , where B is the benefit to the recipient, C is the cost to the actor and r is the genetic relatedness of the recipient to the actor. Given this relationship, a human may forego producing one
of her own offspring to help her full sibling raise offspring, only if it results in at least ______ or more extra offspring produced by her sibling.CorrectIncorrect
- Question 12 of 20
Which of the following is NOT a plant hormone?CorrectIncorrect
- Question 13 of 20
Among foraging shore birds, feeding rates (F, number of prey items consumed in 5 minutes) decrease as the number of neighbours (N) increases as follows: F = 10 – 0.9N. The maximum feeding rate is ________________. (Use decimal notation, not fractions or percentage)CorrectIncorrect
- Question 14 of 20
Which of the following is NOT an adaptation to reduce the risk of predation?CorrectIncorrect
- Question 15 of 20
Which of the following is NOT an example of an evolutionary arms race?CorrectIncorrect
- Question 16 of 20
The Weber-Fechner law states that the magnitude of a perceived sensation increases as log10 of stimulus intensity. Let us assume a background stimulus level of 1 unit, which increases to 10 units in situation P and to 100 units in situation Q. The perceived sensation in situation Q is stronger than the sensation perceived in situation P by a factor of ______. (Use decimal notation, not fractions or percentage)CorrectIncorrect
- Question 17 of 20
Monotremes are unique among mammals because they:CorrectIncorrect
- Question 18 of 20
The most important reason for a neuron to be myelinated is to:CorrectIncorrect
- Question 19 of 20
A small isolated population is more likely to undergo speciation than a large population because, compared to the large population, the small population:CorrectIncorrect
- Question 20 of 20
To which of the following families do the important timber species, sal and teak, belong?
(i) Dipterocarpaceae; (ii) Poaceae; (iii) Solanaceae; (iv) VerbenaceaeCorrectIncorrect