What would happen if there were no plants on earth?
We take Oxygen (O2) from plants, plants give us shadow, provide us with food and fruits. We make furnitures with tree woods, we eat parts of different plant leaves. Other animals in ecosystem also depend on plants for food and shelter. On the other hand, plants take Carbon dioxide (Co2) from us and air. They absorb CO2 from atmosphere and convert into O2 by photosynthesis and thus we get O2. As you know, too much CO2 isn't good for us as CO2 keeps the earth warm but too much CO2 can cause global warming and there are many bad effects of global warming. Plants absorb CO2 that we humans or animals or microorganisms release and keep the temperature of earth ar stable rate.So you see, plants have many advantages in our earth. So if there was no plant, our ecosystem would be disrupted. Herbivorous animals would be extinct without having plants to feed on. And we humans would have many problems too.
Can plants survive on Earth without animals?
Certainly some of them could live without animals, but large numbers of plants wouldn't be able to survive, especially the angiosperms (flowering plants). Flowering plants have coevolved with animals far too much and for far too long to be able to survive without them. Many of them require insect pollinators to reproduce. Others require animals to eat their fruit and pass their seeds in their feces. Without the animals to carry out these functions, reproduction would be either extremely difficult or impossible.
How long would humans survive without bees?
From a biomass standpoint, most human plant food is wind-pollinated: grasses such as rice, wheat, corn, barley, millet, oats. Another large chunk of calories (and protein etc. ) comes from plants that can self-pollinate, such as soybeans. Another chunk of plants can be pollinated by more than one kind of bee. In fact tomatoes, blueberries, cranberries, and most pea family members are better pollinated by bumblebees or carpenter bees than by honeybees.There are over 20,000 bee species in the world. If we lost honeybees, we would be fine, but the harvest of almonds and apricots would become more uncertain and spotty. If we lost all bees, many of the 200,000 flowering plants that are animal-pollinated would go extinct, including many of our favorite food plants. There are other animal pollinators including butterflies, moths, hoverflies, birds, fruitbats and Australian sugar gliders, but most flowering plants prefer bees.Without bees, we would have a much more boring diet, but the bulk of our food plants would not care. We could still eat rice with tofu and soy sauce. Or maize and beans. we’d have trouble with the squash. And forget the apple pie. Take another shot of tequila (agaves are often bat pollinated), or a flagon of wine (grapes are wind-pollinated).
What would happen to the Earth if the ozone layer were destroyed?
Our natural sunscreen, known as Earth's ozone layer, absorbs and blocks the majority of the sun's UV radiation. Without this barrier in place, all of the radiation would reach Earth, damaging the DNA of plants and animals, like us humans. Skin cancer rates would soar, but we might not even live long enough to experience that cause of death.Within days of the ozone layer's disappearance, many plants would die. The intensity of the sun's radiation would make photosynthesis — a process by which plants convert light energy into chemical energy to fuel their growth — an impossibility for all but the largest and slowest-growing florae. And even these holdouts, primarily massive trees, would eventually die, too. Without plants, the food chain would collapse. Herbivores would starve. Omnivores and carnivores could feed off their bodies for a time, but their food supply would dwindle and cause widespread extinction.So where is the ozone layer, exactly, and how does it work? A layer of ozone gas acts as a shield encircling Earth, and exists between 9.3 (15 kilometers) to 18.6 miles (30 kilometers) above its surface. As one might suspect, the ozone layer is filled with ozone, also known as [math]O_3[/math][math] [/math]or trioxygen. Ozone is created when oxygen molecules ([math]0_2[/math]) are split by the sun into a duo of free-ranging oxygen atoms. When one of these free atoms bonds with an [math]0_2 [/math]molecule, an [math]0_3 [/math]molecule -- ozone -- is created.Despite its protective powers, ozone isn't necessarily stable, and it doesn't take much to reduce ozone to its base elements. Take chlorofluorocarbons (CFC's), for example. When these synthetic chemicals, once used as refrigerants and aerosol-spray propellants, travel to the upper atmosphere they begin a chain reaction that spells disaster for the ozone layer. The CFC's are broken down by ultraviolet light and, as a result, release free chlorine atoms that attract oxygen atoms from ozone molecules. And what happens when you take an oxygen atom from ozone? It becomes oxygen. In this way, CFC's can make quick work of the ozone layer, which is why they have been placed under ever-tightening regulations over the past several decades, with a goal of eliminating their use completely later this century.So, I request everyone to do WHATEVER is in your right to save ozone.Reference To: howstuffworks, Google
How will human body cope with sleeping on Mars where a day is longer than a day on Earth?
Won't make much difference. There have been multiple studies of people's natural wake-sleep cycles when they are not influenced by outside cues. People volunteer to spend a month of so in a cavern, with no day/night indications, no conversations with the monitoring crew that tells them it is day or night and so on. There schedule is totally up to them. Food and other items are delivered when they are asleep, and they can eat them whenever they want. Nothing is done to influence their timing about anything. Over time, they adapt to about a 26 to 27 hour "day", if you will (if I recall correctly). People would have no trouble at all adjusting to an extra 30 minutes or so in a day.