Which type of ecosystem has the greatest variation in temperature from its top to its bottom? A. lake
B. pond
C. ocean
D. estuary

Recombinant dna (rdna) creates offspring which are genetically identical to the parent is the process of breeding only organisms with desirable traits involves the removal of the nucleus of a cell combines genes from organisms of different species in a lab

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

Which of the following is an abiotic factor in an ecosystem? a. bacteriab. airc. niched. grass(abiotic=non-living) me !