A. thaliana, or arabidopsis, is a common weed. biologists have selected it over hundreds of thousands of other flowering plant species to serve as an experimental model organism because )it can withstand extremely cold climates(b)it can reproduce in 8–10 weeks (c) it produces thousands of offspring per plant (d) both b and c

The correct answer is option (d) "both b and c".

Explanation:

Experimental model organisms used in scientific investigations have to fulfill certain criteria in order to be useful in the laboratory. Two of the desired characteristics are being able to reproduce quickly and with enough number of offspring in order to study genetic behaviors. Arabidopsis thaliana characteristics of being able to reproduce in 8–10 weeks and producing thousands of offspring per plant (because it can produce thousands of seeds) makes it a model flowering plant for experimental studies.

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.