Ascientist observes certain changes in the physical features of a particular species over time. she concludes that the species has undergone evolutionary change. she wants to study the animals by analyzing their population. she’ll use . the population of this species is decreasing considerably. if this trend doesn’t change, this species will fall under the category of animals.

Taking that this question has been posted by other users in and with the answer choices for it, to fill in the blanks appropriately, the answers to it would be as follows:

1. She wants to study the animals by analyzing their population. She´ll use the quadrat sampling. The reason for this is that this method allows the scientist to study the biodiversity, by using small quadrats where populations of the species being studied can be found. This researcher will place a series of squares and within them she will see samples of the species she is looking for.

2. The population of this species is decreasing considerably. If this trend doesn´t change, this species will fall under the category of endangered animals. This is because although the reduction in numbers is great, there are still enough numbers to not consider the species as extinct.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

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.