Why is more than one reproductive isolation barrier needed to completely isolate a species? Please do not just Go ogle search this question and copy what you find. I am not du mb, I have already searched this and I could not find an answer. I have been trying to have someone answer this question legitimately for the last 30 minutes, and everyone I come across just answers for the points.

is called echinoderms

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.

digestion

it excretes wastes