Explain why earth is considered a closed system?

Which of the following statements is true? Natural energy resources are nonrenewable and are being depleted. Current fuels are not polluting the air. Mercury released into aquatic ecosystems comes from rock erosion.

Hurry i will give brailiest to whoever answers Which scientist most likely studied tadpole cells under a microscope? Schwann Janssen Hooke Schleiden

How could the botanist best determine whether the genotype of the green-pod plant is homozygous or heterozygous?

List 2 states that have different environmental policies and why?

Alexis, a middle-aged woman, is very moody and becomes irritable at the slightest provocation. Recently, her waist size has increased remarkably, and she has joint and muscle aches very often.

What is placebo and why is it used in some experiments

What is organ? a. group of different types of tissue that work together to perform a specific function or related functions. b. group of cells that work together to perform a similar function. c.

The temperate phage lambda can undergo two life cycles depending on the environmental cues. During which cycle does phage lambda form a prophage? Choose one: A. lysogeny B. burst cycle C. lytic cycle D. slow-release cycle

Which blood components work together to form a blood clot

What is the most likely reason that a long beak could be an adaptation for a bird living in a temperature forest?