Competition for light, water, and nutrients is intense among the land plants. plant success is generally related to photosynthes
is, so evolution has resulted in many structural adaptations for efficiently acquiring light from the sun and co2 from the air. as you read this section, focus on how this is accomplished. let's look first at adaptations to increase light capture. how do plants reduce self-shading?
<span>There
are several ways that plants avoid self-shading.
One is through <span>phyllotaxis which is the arrangement
of leaves on a tree which ensures each leaf gets maximum exposure to sunlight.
The other is leaf orientation and leaf area index that maximizes sunlight
capture. The other is their support by the stem that ensures that their growth does
not overlap that underneath it</span></span>
1. Stems are conduits for water and nutrients supporting structures for leaves. 2. Phyllotaxy. 3. Light absorption is affected by leaf area index and leaf orientation.
Explanation: Phyllotaxy is the arrangement of leaves on a stem specific to each species. Plants reduce self-shading by their way of undergoing to self-pruning in which the non-productive leaves that they have been undergoing to the programmed cell death in which this allows plants to reduce self-shading. Self-shading is a common adaptation that they need in a way of having to increase the capture of light that the leaves needs.<span> </span>
The heart has four chambers: The right atrium receives blood from the veins and pumps it to the right ventricle. The right ventricle receives blood from the right atrium and pumps it to the lungs, where it is loaded with oxygen. The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle.
