Before 20 million years ago, Africa was indeed an isolated continent. But because ofcontinental driftit eventually collided with the Levant (the area encompassing modern day Palestine, Israel, Lebanon, Syria, Jordan and Iraq), enabling the invasion of rival herbivores and new predators from Asia. ...
How did sexual reproduction evolve from asexual, unicellular organisms? What method of asexual reproduction does the kalanchoe plant utilize? How does a flower help in plant reproduction? What is asexual reproduction? How does asexual reproduction differ from sexual reproduction?
How did plants evolve from green algae and adapt life on land? Do coral reefs photosynthesize? How are coral reefs similar to rainforests? How did marine organisms adapt to land? How does seaweed adapt to the marine biome? How are nekton adapted to life in the sea?
Oxygen formed made by simple blue-green algae known as cyanobacteria. They are thought to be the first oxygen creating organisms to live on earth. The air we now breathe is all due to these tiny microbes. It was over the next billion or so years that things began to move along.Earthbeca...
Explain the symbiotic relationship between the algae and the fungi in lichen. How do arthropods differ from other invertebrates? Fill in the blank. Ticks, mosquitoes, mites, and lice are examples of ___, organisms that derive benefits from their biologic relationship with another o...
Using scaling theories, the authors found that a hypothetical early animal ancestor (reminiscent of swimming algae that eat prey instead of photosynthesizing) would swell in size and complexity under Snowball Earth pressures. By contrast, a single-celled organism that moves and feeds via diffusion, ...
” explains Grottoli. “When we starve, our bodies metabolize fat, and other living things do the same thing.” High fat reserves helped corals survive until they could acquire new symbiotic algae. The study also showed that corals capable of partnering with multiple species of algae were more...
Would it be simple forms of life such as bacteria, viruses or algae, or more advanced, multi-cellular creatures, perhaps even intelligent beings? Would aliens be animals, plants or have characteristics of both? Would they have arms and legs and walk upright as we do? Would they depend upon...
is the speed of warming. They are simply not being given sufficient time to evolve tolerance. The coral's algal partners have shortlifetimes and possess genetic traits which may enable successful adaptation to warming. Coral themselves aren't so lucky, somewhat in contrast to their algae, they ...
Viruses have, therefore, led lifeforms to evolve an impressive array of antivirus defences. These run from the mundane to the exotic. Among the mundane: some bacteria have evolved mechanical protections that reduce the odds of getting infected in the first place — the microbial equivalent of ma...