Identify the characteristics of the different invertebrates by completing the chart using the following descriptions. Description
- with exoskeleton/ spiny skin/ soft and segmented body/
enclosed in a shell/ hollow-body stinging cells or tentacles/
soft and unsegmented body/sessile aquatic animal

Movement
- fly/ crawl/ swim

Classification
arthropods/ cnidarians/ echinoderms/ flatworms/
mollusks/ roundworms/ segmented worms/ sponges​

What were the success and failures that came to boyle’s excitements?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.