The  graph  below  shows  the  growth  rates  of  populations  of  bacteria  that  have  evolved  for  many  generations  at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria.

Which population has the highest fitness at 25°C ? 

#Question id: 12068

#Unit 7. System Physiology – Animal

#Question id: 10490

#Unit 6. System Physiology – Plant

Which of the following is a correct Match of the stomatal opening and closing mechanism;

               COLUMN A                                                                    COLUMN B

P- Opening of Stomata                        i) Chloride anions are taken up into the guard cells from the apoplast

Q- Closing of stomata                         ii) The malate content of guard cells decreases

iii) starch content in guard cells increases during end of the

iv) Acidification of the lumen stimulates zeaxanthin formation which activates the H+ ATPase causing

v) Accumulation of solute in vacuole such as sucrose and malate leads to

#Question id: 3403

#Unit 11. Evolution and Behavior

Balancing selection is a type of natural selection that balances two or more alleles in population allows maintaining genetic diversity. Which of the following allowed to this type of selection?

A- Heterozygote has the highest level of Fitness than normal homozygote

B- If rare phenotypes are favored over common phenotypes

C- Introduction of new allele in to a population by mutation and allowed to higher fitness in individuals

D- One homozygote has a highest level of fitness than heterozygote and another homozygote

#Question id: 15734

#Unit 12. Applied Biology

#Question id: 7151

#Unit 5. Developmental Biology

In developmental biology, what is meant by the concept of "growth"?

a) Growth occurs through increases in cell size.

b) Growth occurs through increases in cell number.

c) Growth can result from increases in the volume of extracellular matrix between cells.

d) Cell death is an important determinant of overall growth.

Which of the following is correct?