#Question id: 10176
#Unit 6. System Physiology – Plant
Leaves acclimate to sun and shade environments, Sun and shade leaves have contrasting biochemical and morphological characteristics such as
a.) Shade leaves increase light capture by having more total chlorophyll per reaction center, a higher ratio of chlorophyll b to chlorophyll a, and usually thinner laminae than sun leaves
b.) Sun leaves decrease CO2 assimilation by having less rubisco and can dissipate excess light energy and Morphologically they have thinner leaves and a larger palisade layer than shade leaves
c.) Shade leaves decrease light capture by having low total chlorophyll per reaction center, a higher ratio of chlorophyll b to chlorophyll a, and usually thicker laminae than sun leaves
d.) Sun leaves increase CO2 assimilation by having more rubisco and can dissipate excess light energy and Morphologically they have thicker leaves and a larger palisade layer than shade leaves
Which of the following combination from the above statements are TRUE?
#Question id: 6969
#Unit 5. Developmental Biology
In Xenopus, the elongation of the mesoderm toward the anterior results from the intercalation of cells during a process called:
#Question id: 18073
#Unit 11. Evolution and Behavior
#Question id: 31034
#Unit 4. Cell Communication and Cell Signaling
#Question id: 9617
#Unit 9. Diversity of Life Forms
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed 3-chambered hearts (2 atria, 1 ventricle). Birds and mammals, however, are alike in having 4-chambered hearts (2 atria, 2 ventricles). The 4-chambered hearts of birds and mammals are best described as