TLS Online TPP Program

#Question id: 7159


'Intercalary growth' in a regenerating amphibian limb means that if a distal blastema is grafted to a proximal stump:

#Unit 5. Developmental Biology
  1. the distal blastema grows back, to regenerate proximal elements, then out, to regenerate distal structures.
  2. the stump grows out to regenerate proximal structures, until the positional values of the blastema are produced, at which time the distal blastema takes over and completes outgrowth of distal structures.
  3. the distal blastema grows out, regenerating distal structures, resulting in a limb lacking intermediate structures.
  4. the distal blastema grows proximally, intercalating intermediate structures between it and the stump, then growth stops, resulting in a regenerate lacking distal structures.
More Questions
TLS Online TPP Program

#Question id: 11805

#Unit 6. System Physiology – Plant

P-proteins from the genus Cucurbita consist of two major proteins: PP1, the phloem filament protein, and PP2, the phloem lectin. Both PP1 and PP2 are thought to be synthesized in_______A___________and transported via the_______B_________to the_______C______, where they associate to form P-protein filaments and P-protein bodies.

TLS Online TPP Program

#Question id: 28368

#Unit 5. Developmental Biology

 when bicoid mRNA was added to the middle region of Bicoid-deficient embryos, that middle region develop____

TLS Online TPP Program

#Question id: 2771

#Unit 2. Cellular Organization

For SINES (short interspersed elements), which of the following is correct

a. are approximately 300 base pairs long

b.  are LTRs containing retrotransposons.

c. are present in over 1 million copies in the human genome.

TLS Online TPP Program

#Question id: 10551

#Unit 6. System Physiology – Plant

plants possess a second type of immunity mediated by a set of highly specific intracellular receptors known as nucleotide binding site–leucine rich repeat (NBS–LRR) receptors. How NBS–LRRs become activated,

TLS Online TPP Program

#Question id: 5348

#Unit 8. Inheritance Biology

Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele for long wings (XL). Following different cross with resulting progeny were possible

Male parent

Female parent

Heterozygous

Male offspring

Female offspring

Long wings

XLY

Long wing

XL Xm

       A

B

Miniature wings

XmY

Long wing

XL Xm

C

D

Which of the following above offspring is not possible to carry miniature wings?