Of the following, which is not an echinoderm

a. sea star
b. lobster
c. sand dollar
d. sea urchin

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

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.