#Question id: 11275
#SCPH28 | Zoology
Consumption efficiency is the proportion of production at one trophic level that is eaten by, or ingested, by the next trophic level which of the following are correct statement ?
A.Consumption efficiencies higher in forests than grassland
B-In aquatic ecosystems consuption efficiencies of hervivore are greater than terrestrial hervivore
C- Consumption efficiencies for carnivores are typically higher than those of herbivores
D-Primary production consumption is increased where it is high in nutrients such as nitrogen and phosphorus
#Question id: 9221
#SCPH06 I Botany
The primary difference between the small-population approach and the declining-population approach to biodiversity recovery is that ________.
#Question id: 15267
#SCPH06 I Botany
#Question id: 1592
#SCPH28 | Zoology
Which of these molecules is incorrectly paired with a source?
#Question id: 7764
#SCPH06 I Botany
Cellular senescence
may have evolved to protect organisms against cancer. Instead of dividing out
of control, the cells die. Cellular senescence appears to be regulated by
several tumor suppressor genes, especially p53.what is the most appropriate
reason behind this,
1) Transcription
factor p53 is thought to suppress tumorigenesis by causing cell arrest and
senescence in response to short telomeres, DNA damage, and viral or external
signals to divide
2) This factor can
stop the cell cycle, cause cellular senescence in rapidly dividing cells,
instruct genes to initiate cellular apoptosis, and activate DNA repair enzymes.
3) Induction of apoptosis or cellular senescence by p53 always beneficial.