The two algae seen here are classified as green algae. That means they make their own food by photosynthesis. The algae on the left is one-celled, or unicellular. The algae on the right is many-celled, or multicellular. How are these two types of algae different? Question 5 options: Only the the multicellular algae contains a chloroplast. They are different only in how many cells make up each algae. Only the multicellular algae has chlorophyll for photosynthesis. The multicellular algae cell has many more parts than the unicellular algae.

Classify the descriptions and examples as endocrine or neural control

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

This comparative chart is an example of one that might be used by scientists and law enforcement personnel for identification purposes. the chart represents a technological advance called