Sunlight
solar energy
water
D. In a regimen of two to four drugs
Its called the greenhouse effect
Answer: The current predicted doubling time is 61years which makes 50years in your option the nearest possible answer.
Explanation:The world's current (overall as well as natural) growth rate is about 1.14%, representing a doubling time of 61 years.
We can expect the world's population of 6.5 billion to become 13 billion by 2067 if current growth continues.
Answer: Types of Plants: Plants are all unique regarding physical appearance, structure, and physiological behavior. Aside from that, they also vary in their habitats, tolerance, and nutrient requirement.
So with that kind of diversity, the big question is, how do you exactly start to classify them? Good thing botanists have already devised ways to classify them. In fact, classifying plants is considered as one of the oldest approaches in studying botany.
In general, botanists group plants into two major groups: non-vascular and vascular. The former being composed of early plants while the latter consists of plants which had developed a vascular system.
However, this kind of grouping seems to be very general and covers a wide variety of scope. The more commonly used plant classification is the more specific one: by classifying them into different phyla.
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