The organism shown is a free-living one that is anchored to the bottom of ponds and streams during the first part if its life cycle. what is the common name of the group to which this organism belongs? a. comb jellies b. arthropods c. echinoderms d. cnidarians

Which incident would result in primary succession instead of secondary succession?

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

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.