A small light-colored bivalve with shell ornamented by distinct, concentric sulcations, anterior and posterior lateral teeth with many fine serrations. Dark shell morphs exist but are limited to the southwestern United States. The light-colored shell morph has a yellow-green to light brown periostracum and white to light blue or light purple nacre while the darker shell morph has a dark olive green to black periostracum and deep royal blue nacre (McMahon 1991). . (2001) reported yellow and brown shell color morphs among specimens collected from Sichuan Province in China. The shells of the yellow morphs were straw yellow on the outside and white on the inside; those of brown morphs were dark brown and purple, respectively. Further analyses revealed that the yellow and brown morphs are triploid and tetraploid, respectively.
Limits to variation The most obvious limit to natural selection is that suitable variation may not be available. This may be because certain phenotypes cannot be built, being ruled out either by physical law or by the properties of biological materials.
Answer:
ima be honest i did not know so i had to look it up so i hope this helps?
Explanation:
Terms in this set (9)
normal distribution the frequency is highest for the the middle, or mean phenotype, and lowest for the ends, or extreme phenotypes
what phenotype has the greatest frequency in a trait that follows a normal distribution? ...
microevolution the observable change in the allele frequencies of population over time
Answer:
The correct answer is "Thylakoid Membrane".
Explanation:
Photosynthesis results in free electrons due to the energy from sunlight so there is also photon movement. In plants this happens in the chloroplasts. Chemiosmosis defines the movement of ions (hydrogen ions H+) which happens towards the thylakoid membrane from the stroma. I hope this answer helps.
Cough, runny nose, inflamed eyes, sore throat, fever, and a red, skin rash.
