Correlation between life span and the ability of fibroblasts to repair DNA in various mammalian species, Repair capacity is represented in autoradiography by the number of grains from radioactive thymidine per cell nucleus. According to graph, which factor exist on x-axis ? Note that the y-axis (life span) is logarithmic.

TLS Online TPP Program

#Question id: 29045

#Unit 10. Ecological Principles

Surface Temperatures Reflect the Difference between__

TLS Online TPP Program

#Question id: 29046

#Unit 10. Ecological Principles

All homeostatic systems used by organisms to regulate body temperature are described by which of the following?

TLS Online TPP Program

#Question id: 29047

#Unit 10. Ecological Principles

Homeotherms regulate body temperature by__

a) remain body temp constant

b) Equal the ratio of heat in and heat out

c) Heat in involve convection and conduction 

d) Heat out involve metabolism and solar radiation

TLS Online TPP Program

#Question id: 29048

#Unit 10. Ecological Principles

Many organisms minimize heat loss to the environment via___

TLS Online TPP Program

#Question id: 29049

#Unit 10. Ecological Principles

Some given statements about anti freezing are given;

a. some invertebrates to withstand temperatures as low as –18°C without freezing, in presence of glycoproteins

b. Sodium, potassium, or chloride ions involve to increasing  the blood freezing point, so the lack of these ions some species help to lower the blood freezing point

c. Amphibians release large amount of glucose into the blood to prevent freezing of blood in cold

d. Sodium, potassium or urea function as anti freezing in their blood

e. Glycine causes supercooling in plants

Which of the following statements about supercooling/anti freezing is correct?

TLS Online TPP Program

#Question id: 29050

#Unit 10. Ecological Principles

Which of the following cells can withstand temperatures down to–38°C?