Phosphorylation of tyrosine in activation loop leads to a conformational change in the activation loop that unblocks the kinase active site for either ATP or the substrate by:

Reducing the Kd 

Increasing the Kd

Reducing the affinity

Increasing the affinity

Which of the following combination is correct?

#Question id: 11506

#Unit 9. Diversity of Life Forms

A biologist discovers a new unicellullar organism that possesses more than two flagella and two small, but equal-sized, nuclei. The organism has reduced

mitochondria (mitosomes), no chloroplasts, and is anaerobic. To which clade does this organism probably belong?

#Question id: 11507

#Unit 9. Diversity of Life Forms

Which two genera have members that can evade the human immune system by frequently changing their surface proteins?

1.  Plasmodium

2.  Trichomonas

3.  Paramecium

4.  Trypanosoma

5.  Entamoeba

#Question id: 11508

#Unit 9. Diversity of Life Forms

Which of these taxa contains species that produce potent toxins that can cause extensive fish kills, contaminate shellfish, and poison humans?

#Question id: 11509

#Unit 10. Ecological Principles

What is value of net reproductive rate?

#Question id: 11510

#Unit 10. Ecological Principles

Life history trait varies environmental condition, both survivorship and fecundity is habitat dependent in practice but intrinsic rate of increase can change as environmental change. Following life history trait is characteristic of r-selected species?

A) Later age at first reproduction                    B) Long generation time

C) Multiple broods per life spans                    D) Large number of offspring per brood

#Question id: 11511

#Unit 10. Ecological Principles

A metapopulation is