Read the passage below. Prior to the 1970s, scientists thought that new neurons could not be generated in adult brains. In the 1970s, Dr. Goldman and Dr. Nottbohm discovered that hormones injected in adult songbirds could cause female songbirds to develop new neurons. Which statement best exemplifies the scientific principle that was involved in this case? New experiments do not affect science because science remains constant. New experiments can affect future scientific explanations. New experiments can affect previous scientific explanations. New experiments yield untrustworthy data and should be carefully considered.

climate change and pollution

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.

if you know your abc's you should be able to get your answer or just use google