TLS Online TPP Program

#Question id: 1098


Which of the following is the most plausible explanation for why an animal cell would be unable to reduce the Ca2+ concentration in its cytosol compared with the extracellular fluid?

#4. Cell Communication and Cell Signaling
  1. inactivation of calcium-gated ion channels in the cell membrane

  2. excessive transport of calcium from the cytosol into the endoplasmic reticulum

  3. insufficient ATP levels in the cytosol

  4. insufficient levels of protein kinase in the cell

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TLS Online TPP Program

#Question id: 11385

#10. Ecological Principles

Which of the following biomes is correctly paired with the description of its climate?

A) savanna-low temperature, precipitation uniform during the year

B) tundra-long summers, mild winters

C) Taiga-relatively short growing season, Low precipitation

D) temperate grasslands-relatively warm winters, most rainfall in summer

E) tropical forests-nearly constant day length and temperature

TLS Online TPP Program

#Question id: 11403

#10. Ecological Principles

Several categories of risk of species extinction have been defined. A species can be determined as critical endangered if there is considered to be

TLS Online TPP Program

#Question id: 11404

#10. Ecological Principles

You were discovered 4 species in forest, their characteristic as following,

A specie eat only bamboo;

B species eat fruits of many tree species;

C species Short life span;

D species low population variability .

Which of the following species characteristics have been proposed as more prone to extinct?

TLS Online TPP Program

#Question id: 11405

#10. Ecological Principles

Vulnerability to extinction can be linked to species following characteristics. Which of the following statement are correct?

A. Endemism species are more prone to extinction than fragmented

B. Species that are capable of migrating between fragments of habitat, such as between mainland areas and islands, may be more resistant to extinction

C. Population variability species are less prone to extinct

D. Species with naturally long life spans may be more likely to become extinct

TLS Online TPP Program

#Question id: 11406

#10. Ecological Principles

Which of the following is true for a critically endangered species?

TLS Online TPP Program

#Question id: 11407

#10. Ecological Principles

Which of the following is incorrect statement?