Part Ill. Short Answer. Please provide a concise answer to each question below i
ID: 176211 • Letter: P
Question
Part Ill. Short Answer. Please provide a concise answer to each question below in the space 28. As living organisms on planet Earth, the process of photosynthesis is very important to c three reasons why this process is important to life on Earth. (3 pts.) 29. At the genetic level, what is evolution? (3 pts.) 30. List two key innovations (ie., adaptations) found only in the Angiosperms, and expl allowed this phylum to become the most diverse and dominant of all land plants. (5 e genetic drift, gene flow and mutation considered non-adaptive mExplanation / Answer
Answer 28: Photosynthesis is important mostly for green plants as they make food from that process.
Oxygenic photosynthesis is written as follows:
6CO2 + 12H2O + Light Energy C6H12O6 + 6O2 + 6H2O
Importance of Photosynthesis step in life:
1. It supplies life on earth with energy, harnessed from the sun.It was clearly explain as the sun releases a lot of energy through constant nuclear reactions (fusion of hydrogen) and plants have the ability to use the light energy. It releases energy to produce glucose which they can then store and use. This stored glucose (stored as starch due to it being insoluble) is then consumed by the next organism in the food chain. The energy from the sun is passed down the food chain (sun - plant - herbivore - carnivore/omnivore) supplying the whole food chain and earth with energy.Herbivores and omnivores eat plants to gain energy which is stored in the plants and after that carnivores and omnivores eat them. And this way the life cycle goes on.
2. This step is important because all living things need oxygen to survive. All producers make oxygen to survive. All producers make oxygen and sugar for the secondary consumers and then the carnivores eat animals that eat the plants.
3. It is the building up of food components from water absorbed from the soil through the roots and carbon dioxide, absorbed through the stomata from the air along with the use of sunlight to split up water molecules to form hydrogen and oxygen. Thus, oxygen is released and carbon dioxide is absorbed. This is a vital process.
Answer 29: Biological evolution is the process of change by which new species develop from pre-existing species over tiime, it can be defined as any change in the frequency of alleles in populations of organisms from generation to generation. It is important to understand that not all change is considered evolution; evolution encompasses only those changes that are inheritable and may be passed on to the next generation.
The evidence of evolution has been derived from fossil records, genetics study, and changes observed among organisms over time. The process produces the transformations that generate new species only able to survive if they can respond quickly and favorably enough to environmental changes. Population genetics is the discipline that considers variation and changing ratios of genetic types within populations to explain how populations evolve.
Answer 30: Flowers and Fruits as an Evolutionary Adaptation:
The two innovative structures of flowers and fruit represent an improved reproductive strategy that served to protect the embryo, while increasing genetic variability and range. It evolved from small woody bushes, or were basal angiosperms related to tropical grasses.
Angiosperms produce their gametes in separate organs in a flower. Both fertilization and embryo development take place inside an anatomical structure which provides a stable system of sexual reproduction. Flowering plants are the most diverse phylum on earth after insects, it comes in a bewildering array of sizes, shapes, colors, smells and arrangements. The relationship between pollinator and flower characteristics is one of the great examples of coevolution.
Fruit can vary tremendously in appearance, size, smell, and taste like flowers. Fruits such as tomatoes, walnut shells and avocados are the example. As with pollen and seeds, fruits also act as agents of dispersal. Some may be carried away by the wind. Many attract animals that will eat the fruit and pass the seeds through their digestive systems, then deposit the seeds in another location.