What is the process of plants releasing oxygen? How is …
Only plants can photosynthesize, but both plants and animals depend on respiration to release the chemical potential energy originally captured through photosynthesis.
Most forms of photosynthesis release ..
Depending on a main sequence star's spectral type, even a planet with 's atmospheric composition may be colored differently. In general, larger and more massive, main-sequence ("dwarf") stars have hotter surface temperatures than our Sun, , and so they radiate more photons, particularly towards the more energetic, bluish end of the spectrum. As a result of their greater luminosity, Earth-like planets would orbit farther away from hotter dwarf stars to avoid getting scorched, but their skies would still appear bluish due to of abundant bluish photons. Around smaller, less massive and dimmer dwarf stars, however, planets would have to orbit closer in order to sustain a surface temperature that is warm enough to keep water liquid and so the star would appear larger in the sky. In addition, stars with surface temperatures of 3,300 kelvins or lower (red dwarfs of spectral type M2.5 such as , or redder) would emit so fewer photons towards the bluish wavelengths compared to Sol that the sky would appear whitish down to reddish to Human eyes (more from ). If comparatively more bluish or reddish light reaches a planet's surface than on Earth, photosynthetic plant-type life may may not be greenish in color, because such life will have evolved to different pigments in order to optimize their use of available and so color the appearance of the planet's land surfaces accordingly.
Extraterrestrial photosynthetic plant-type life may look quite look different in color because they will have evolved their own pigments based on the colors of light reaching their surfaces. of NASA's Goddard Institute for Space Sciences has modelled the light reaching the surfaces of Earth-sized worlds orbiting their host stars at distances hospitable to Earth-type life, where liquid water could exist on a planetary surface, where depending on the star's brightness (and color) and the planet's atmosphere. Kiang found that "plants" on Earth-like planets orbiting stars somewhat brighter and bluer than the Sun might look yellow or orange, and even look bluish by reflecting a dangerous overabundance of more energetic blue light. On the other hand, plants on planets orbiting stars much fainter and redder than the Sun might look black. Hence, astrobiologists seeking signs of life on planets outside the Solar System may want to look for colors reflected by planetary vegetation that is colored differently than the green wavelengths found on Earth (NASA/GSFC ; Spitzer ; ; ;; and ).
What Are Photosynthesis and Respiration? - dummies
How long will it take for the beetles to kill off the tamarisk?
To “kill off” a tamarisk plant without chemicals or removal of the total plant and roots from the ground is difficult. However, repeated defoliation of the plant leads to a reduction in photosynthesis and thus food for the plant/roots. Each time the plant is defoliated should result in a decrease or dying off of some of the root mass. If this happens repeatedly and the plant isn’t allowed to grow new foliage and retain it for an extended length of time, it is possible to kill the plant. Estimates on die off of the tamarisk due to defoliation via the beetle suggest 3 to 5 years, but this could be longer or shorter depending on the size of the plant and its root mass, how often it’s defoliated and how limited the time is that the plant retains foliage.
chloroplast | Function, Location, & Diagram | …
In 2004, A.P.H.I.S (Animal and Plant Health Inspection Service, USDA) personnel opened the Delta, UT, site to the collection of the tamarisk beetles and larva for Utah agencies and organizations and subsequent release of collected beetles and larva within Utah. Beetles and larva could be moved and released on private and certain state lands (no federal lands). Individuals from Grand County, with knowledge of biological control, collected beetles and larva from the Delta site and distributed them to approved sites in Grand County, with two sites receiving two separate releases in 2004.
The light-dependent reactions (article) | Khan Academy
What happens after the beetles have defoliated the tamarisk?
Once the tamarisk has been defoliated it can no longer photosynthesize and eventually this will kill the tree. Estimates vary and can depend on several variables including the vigor of the tree and the duration of exposure to the beetle. Recent observations from the Delta, Utah, release site indicate that a tree can be killed within 3-5 years of beetle infestation.
IB Biology Notes - 8.2 Photosynthesis
When and how were the beetles released?
Tamarisk biological control began in the 1970s with the study of potential control insects by USDA-ARS (United States Department of Agriculture - Agricultural Research Service). Quarantine testing of insects began in 1992. Approval to begin field testing was given in 1999 and the beetles were released in outdoor cages in research areas at 10 sites in 6 states (CA, NV, UT, CO, WY & TX). In 2001, the beetles were released from the cages at these 10 sites.