Which of the following was not a accomplishment of Leonardo da Vinci? 1. giant crossbow
2. Proportions of man
3. laws of gravity
4. plate tectonics

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.