A human grows in size from a zygote (fertilized egg) to an e…

A human grows in size from a zygote (fertilized egg) to an embryo to an adult. This is primarily through the production of additional cells. The process that produces the additional cells is [a]. The cells in the multicellular adult differ in structure and function because they [b].

A diploid salamander experiences a failure in cell division…

A diploid salamander experiences a failure in cell division that results in the production of tetraploid offspring. The diploid individuals each contain 2 copies of 4 chromosomes, but the tetraploid individuals contain 4 copies of the 4 chromosomes. Diploid salamanders produce haploid gametes (1 copy of each chromosome per gamete), and the tetraploid salamanders produce diploid gametes (2 copies of each chromosome per gamete). Under the biological species definition, should the diploid and tetraploid salamanders be considered separate species, or the same species?

A student reads the following questions and answers online:…

A student reads the following questions and answers online: Q: How do plants get energy? A: Plants use carbon dioxide and water as their primary sources of energy. Q: Where does a plant’s biomass come from? A: Plants get most of the materials that make up their biomass (like cellulose, starch, etc.) from mycorrhizal fungi in the soil, so most of a plant’s biomass comes from the soil. Q: How to plants get nitrogen? A: Plants get the nitrogen they need by taking in N2 from the air and incorporating it into biological molecules. Correct each of these answers to accurately state how plants obtain energy, the material for their biomass, and nitrogen. Your answers do not need to be long, but should be clear and specific.