The slightest change in pH can destroy the substance or organism. The pH of a cell's interior helps regulate the cell's chemical reactions. For example, the pH of blood is 7.4, if blood falls to 6.8 or lower or 8.2 or higher, it results in death.
Plant cells have a rectangular shape and a cell wall, while animal cells have a circular shape and no cell wall
Answer:
food chain
Explanation:
producers are consumed by herbivores, the herbivores are consumed by omnivores, omnivores are consumed by carnivores. the food web is more accurate though
B. response to a stimulus
The sunflower is the responding to the sun's light (the stimulus) by bending towards it
Answer: hybridisation between related species is unlikely to contribute to adaptive speciation.
Explanation: any population has natural genetic variation. The available resources are insufficient for all plants (and conversely, not all offspring survive). Natural selection favours variations better suited to the conditions.
Although hybridisation is more common in plants than animals, and can lead to speciation, adaptive radiation from an ancestral species is the general response to environmental change, such as from rainforest to savanna. There is low probability of selective advantage from hybridisation of two ancestral species adapted to niches within the original habitat when the conditions in those niches changes significantly.
