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Cacti have spines that evolved from leaves.
Decaying leaves mixed into dirt with a hand full of earthworms would be far better as fertilizer than burnt leaves. Burnt leaves would contain a high level of carbon but no cellulose. Mulch of leaves, grasses, soil, and earthworms would be better than burnt leaves because it'd be easier for the nutrients to leech into the soil.
The Sahara Desert is a massive desert. It is now bigger than the United States and Australia combined together.
Well, in the forest ecosystem, it has more plant life than the forest ecosystem.Also, their temperature's are different.And, the forest ecosystem is usually more humid then the desert ecosystem.The forest ecosystem is also probably cooler then the desert ecosystem, depending what either lives there or where the forest and desert is located.
desert plants and tropical plants have evolved in different ways such as: . desert plants sore water to survive whereas tropical plants have waxy leaves to drain the water . tropical plants have huge leaves to help encourage pollinators and reach the sun light whereas desert plants have thorns and smaller leaves that are grey to reflect the sunlight.
Cacti have spines that evolved from leaves.
because they have CAM photosynthesis (they absorb CO2 at night), they don't have leaves with large surface area (the spines are leaves) to save water (minimizes transpiration), They photosynthesize through the stem rather than the leaf.
Cacti live in the deserts of the Americas and many have sharp spines. In Africa there are other plants, euphorbias for example, that resemble cacti but have thorns rather than spines.
Yes
Not necessarily
they have bigger eardrums than us
No, not all cactuses have spines. Some cactus plants have many more than others. Some have longer or shorter, finer or thicker spines. Some have white spines, some colored. And some don't have any spines at all.
Generally, leaves of desert plants are smaller than their counterparts elsewhere. However, their is no particular size unless you specify a particular species of plant
The animals in the desert are better than the animals in the desert because the desert animals can survive like years without water. The animals in the rainforest get water like everyday so the animals in the rainforest would die if they went like a day without water.
because it do not leaves smoke
prevention is better than cure.
You would have to define "better" in order for us to answer that. Not possible to answer as is. Sorry.