meso-middle; intermediate Designating an achiral member of a group of diastereoisomers that has at least one chiral member meso-tartaric acid; Derived terms
Many animals within the park rely on specific types of plants as their sole food source. Monarch butterflies, for example, only lay their eggs on milkweed, and only eat milkweed while in their caterpillar phase. Milkweed requires a moderately acidic soil to grow, surviving in soil pH levels from 4.8 to 6.8.As with most other plants, it cannot tolerate pH levels below 4. Overly-acidic soil prevents roots from being able to absorb water and nutrients crucial for survival.ilkweed requires a moderately acidic soil to grow, surviving in soil pH levels from 4.8 to 6.8. As with most other plants, it cannot tolerate pH levels below 4. Overly-acidic soil prevents roots from being able to absorb water and nutrients crucial for survival.
Milkweed is essential for the existence of Monarch butterflies. A Monarch butterfly is pictured at the top of this page. Adult Monarchs (and many other butterfly species) love nectar-rich milkweed as a food source, but there is a more important reason for the Monarch's close attachment to milkweed.ome northeasterners assume common milkweed to be the only milkweed species which exists. Actually, over 100 species of Asclepias grow in the USA, with over 200 different species growing worldwide. Common milkweed is not the only Asclepias species which can be utilized as a food source for the monarch caterpillar.