Practice Questions

TLS Online TPP Program

#Question id: 9189

A plant will recognize a pathogenic invader

#9. Diversity of Life Forms

if it has many specific plant disease resistance (R) genes.
when the pathogen has an R gene complementary to the plantʹs antivirulence (Avr) gene.
only if the pathogen and the plant have the same R genes.
if it has the specific R gene that corresponds to the pathogen molecule encoded by an Avr gene.

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TLS Online TPP Program

#Question id: 5073

#5. Developmental Biology

The emergence of the polarity of an embryo is the result of:

TLS Online TPP Program

#Question id: 5074

#5. Developmental Biology

The "mid-blastula transition" is the point in development when:

TLS Online TPP Program

#Question id: 5076

#5. Developmental Biology

Homeotic genes are responsible for:

TLS Online TPP Program

#Question id: 5077

#5. Developmental Biology

Humans and mice heterozygous for loss-of-function mutations in Pax6 have:

TLS Online TPP Program

#Question id: 5078

#5. Developmental Biology

A human blastomere is:

TLS Online TPP Program

#Question id: 5079

#5. Developmental Biology

The pattern of embryonic development in which only the cells lacking yolk subsequently undergo cleavage is called: