What are the predators of Glaucus atlanticus? - zoology
Frick et al. (2009) 1 found that about 42% of logerhead sea turtle (Caretta caretta) stomachs contained remnants of G. atlanticus. We were able to identify G. atlanticus in the diet of loggerheads because whole or nearly intact specimens were present. Loggerhead turtle mouth and throat with sharp papillae.
Why can't the human eye focus blue light? - Biology Stack Exchange
2015年3月20日 · Because it has a shorter wavelength, blue light is scattered ten times more than red light. One reason is that blue light has a frequency that is closer to the resonant frequency of atoms than e.g. red light (Exploratorum). Due to this scattering the eye has difficulty focussing as object edges get fuzzy.
Why do I see different hues of colors between each of my eyes?
The right eye is more red-tinted ('warmer' hued) and the left is typically more blue-tinted ('cooler' hued). However, sometimes I can't notice any difference in hue between the eyes (even when closing the other) and on a very rare occasion the warm/cool differentiation is switched (left is warm hued, right is cool hued).
What species is this black, blue and white bird? - zoology
2017年5月18日 · 18. That bird is commonly called a magpie. The only species found in Alberta is Pica hudsonia. You can see a reference image on the left and their distribution throughout Canada on the right: [source] Interestingly, it is one of the only non-mammals studied that is able to recognize itself in a mirror.
What do blue cone cells add to visual function?
However, missing the blue cones would eliminate a large proportion of the visual spectrum. Evolutionary spoken, primate vision started off with dichromatic vision. These early dichromats had retinas with one type of cone sensitive to medium-to-long wavelengths (M/L cones) and one type sensitive to short wavelengths (S cones) (Jacobs, 1996).
Are mosquitoes attracted to blue lights in particular?
2020年3月7日 · 1. It is not an urban myth. UV and blue lamps are good insect attractants. They have been used for many decades in insect traps, and these too work for mosquitoes. These lamps are routinely used in ecology at insect sampling sites. In some cases, such as with diurnal moths, yellow lamps can also be good attractants.
When do Blue Jays form their crests? - Biology Stack Exchange
2021年7月22日 · 2. Short answer. It seems like blue jays form their crests as adolescents, after their first post-juvenal molt before their first winter. Longer answer. The top of the head of a bird is called the pileum, with the very top called the crown. As far as I can tell there is no particular distinction between "crown feathers" and "crest feathers ...
Identify blue/translucent jelly-like animal on beach
2023年5月1日 · Note: my initial gut reaction was that it was a small, beat-up Portuguese man o' war (Physalia physalis), often referred to as the Pacific man o' war (or even a "blue bottle") in the Pacific Ocean. A colonial marine siphonophore (within class Hydrazoa) made of …
Why do veins look blue? - Biology Stack Exchange
2014年5月30日 · Deoxygenated venous blood has a greater absorption coefficient than oxygenated arterial blood in the red spectral region, and this difference of two, rather small, values is amplified because of the long path length of red light in scattering tissue. As a result, veins are more likely to look blue than arteries at the same diameter and depth.
botany - Plant growth in blue light - Biology Stack Exchange
2016年11月29日 · Chlorophyll is a green photosynthetic pigment that is found in most plants. The chlorophylls are found around pigments in the photosystem, chlorophyll helps the plant to get the right wavelength of light. There are two types of chlorophyll a and b. Chlorophyll a absorbs red and violet wavelength best, but it absorbs very little blue light.