#Question id: 10909
#Unit 6. System Physiology – Plant
The energy is essential for some aspects of movement from sieve elements to sink cells, which store or metabolize the sugar. This movement of photosynthate from sieve elements to sink cells is called
#Question id: 19382
#Unit 12. Applied Biology
#Question id: 9237
#Unit 9. Diversity of Life Forms
Which of the following factors causes extremely high levels of toxic chemicals in fish-eating birds?
#Question id: 10334
#Unit 6. System Physiology – Plant
N2 combines with hydrogen to form ammonia under elevated temperature (about 200°C) and high pressure (about 200 atmospheres) and in the presence of a metal catalyst (usually iron). The extreme conditions are required to overcome the high activation energy of the reaction. This nitrogen fixation reaction, called
#Question id: 10613
#Unit 10. Ecological Principles
Life-history characteristics associated with K-selected organisms include