Sunday, 26 April 2015

Leaves and Photosynthesis

                                                     Sampaguita/Jasminum sambac
Sampaguita or Jasminum is a sweet scented tropical flower. This flower is mainly used in Philippines and Indonesia. (They are served as National Flower)This beautiful ornamental blooms cover the glossy green leafed bushed type ever bloomer. The Sampaguita is also well known in Asia for its use in teas and religious offerings, symbolizing divine hope. This flower grows on a woody vine or semi-climbing shrub, which reaches a height of 1-2 meters. The leaves are ovate or rounded in shape and 6 to 12 cm long. The leaves and Sampaguita flowers grow on short stalks. This flower blooms either singly or as bundle of blossoms at the top of the branches. Blooming through the year, this flower is pure white, small, dainty, star-shaped blossoms. This flower opens at night and wilt in less than a day. The Sampaguita flower has about 8-10 calyx teeth that are very slender, and 5 to 8 mm long. The Sampaguita;s corolla tube is slender and 1.5 to 2 cm in diameter. The 2 stamens on the Sampaguita are included with a 2 celled ovary.They feed on the nutrients in the soil, and needs a lot of photosynthesis for their growth. The plants are both full sun and shade tolerant. For the flower blooming plants needs a lot of sunlight.



Peach trees
Peach trees are originally from China. It states that this fruit was one of the few favorites of the Chinese Emperors. From China, the "Persian Apple" was introduced to the Romans by the Persians (now Iranians) and later was introduced to Alexander the Great. A standard-sized peach tree will  grow to 25 ft tall, just as wide as it is if not pruned. A dwarf peach will grow for about 6 ft tall and wide. For the besst productivity, keep standard peaches pruned to about 15 ft tall. The flowers are produced in early spring before the leaves. they are solitary of paired; 2.5 or 3 cm diameter, pink with five petals. Peach growers strive to produce consistently good yields of high quality fruit. The peach tree's purpose in producing fruit is simply to reproduce, to develop viable seed. This section reviews the growth and reproduction of peach trees and their interaction with the environment. 

Monday, 13 April 2015

Mutations

The Ruby-Throated humming bird is one of the most widespread and common species within the eastern united states. They breed during the summer and migrate south during the winter.

A young flock migrated south to Costa Rica. Though a strange occurrence within the flock was noticed when one of the young hummingbirds couldn't suck the nectar out from multiple flowers. Strange enough the tagged humming bird had a strange beak. It was way shorter than the average Ruby-Throated Humming Bird. The beak was thin, slender, and pointed like one of a Warbler.

This was most likely another process of natural selection that had mutated the gene controlling beak shape and length. Compared to the other humming birds within the flock, it had a difficult time sucking on the nectar within the wild flowers as it's beak was not long and tubular straw like beak that other humming birds have. Yet it did have a higher affinity of picking insects off leaves, twigs, and bark.


As because of this mutation the humming bird would have found it harder to breed within the flock as this mutation would lead to more difficulties within humming birds that find nectar as it's main diet. In the end i'd conclude that this mutation having affected the young humming bird was against it. While it's migration pattern wouldn't have to change that much, it would still have a difficult time adjusting it's diet.