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#Question id: 8911


The larvae of some insects are merely small versions of the adult, whereas the larvae of other insects look completely different from adults, eat different foods, and may live in different habitats. Which of the following most directly favors the evolution of the latter, more radical, kind of metamorphosis?

#I Life Science/ Life Sciences Group – I-V
  1. natural selection of sexually immature forms of insects
  2. changes in the homeobox genes governing early development
  3. the evolution of meiosis
  4. B and C only
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#Question id: 278

#SCPH12 I Genetics

DNA wraps around an octamer of histones to form bead-like structures called ________.

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#Question id: 10994

#I Life Science/ Life Sciences Group – I-V

When recording lead II on an EKG, the positive electrode is the

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#Question id: 4763

#SCPH12 I Genetics

in a rare blood type referred to as the bombay phenotype, individuals are unable to attach the a or b antigens to their red blood cells. individuals that are homozygous recessive for gene "h" have the bombay phenotype and their blood type is type "o" regardless of their abo genotype. this is an example of what extension of mendelian inheritance?

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#Question id: 5441

#SCPH06 I Botany

Two pure line of corn have mean cob length of 15 cm and 5 cm, respectively. 6 polygenes involved in this trait exhibit additive gene action. Crossing these two lines is expected to produce a progeny population with mean cob length of

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#Question id: 4757

#SCPH12 I Genetics

The newborn baby of a mother having blood group O, Rh+ and father having blood group AB, Rh-, got mixed with other babies in the hospital. The baby with which of the following blood groups is not confirmable to be of the said couple?

(i) AB, Rh+                                                    (ii) O, Rh+

(iii) A, Rh+                                         (iv)  B, Rh+