Malaria, a type of parasite, infects 500 million people each year by infecting the red bloodcells of its host. The virus, HIV, that causes AIDS, reports 50,000 newly infected persons. Which statement best differentiates the pathogens, parasites and viruses? A. All though both rely on other living organisms to survive, viruses are usually beneficial.

B. Although both rely on other living organisms to survive, parasites feed on the host organism.

C. Although both are living organisms, parasites depend on the cells of living things to reproduce.

D. Although both are living organisms, viruses break down dead plants and animals that other organisms use.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

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.

the missing space is phylum