Three of the following are evidence that charophytes are the closest algal relatives of plants. Select the exception. a. similar sperm structure b. the presence of chloroplasts c. similarities in cell wall formation during cell division d. genetic similarities in chloroplasts

Video transcript

Hi everyone. Our next question says on the basis of different evidence, which one is the closest algal relative of plants and were given four different types of algae. Rhoda fights. Ciara fights fights and santa fights. So when we think about different algae classes and what evidence might show us a close relationship to modern plants, we're gonna we can look at different things. We can look at the pigment molecules that are involved in photosynthesis and the algae their color. We'd look to see which might have the same pigments as modern plants. We can look at the molecule used for energy storage and we can look at the cell walls. So when we look at plants, well they use um chlorophyll A. And B. They use starch for energy storage and they have cellulose making up their cell walls. So let's look at our algae classes here, we start with a rodeo fights. That prefix rodeo means red. These are the red algae. And as you might guess by seeing their different color, they have different pigment molecules than modern plants. They do have some chlorophyll, they have chlorophyll A. And some other pigments. Um But not that A. And B. The plants have as their as their chlorophyll and they use a different storage molecule. They use uh Floridian starch. So a little different from plants. Now let's look a choice be sarah fights. Sarah fights are green algae, they have the same pigment molecules that chlorophyll A. And B. They use starch, just like plants and they have cell walls made of cellulose. So three different things identical to modern plants in the tariff fights. So that's looking pretty promising. Let's move on to feta fights fights Are that brown algae? Again, we see that different color. They have different pigments. Then modern plants, they actually use chlorophyll A. But they also have chlorophyll C. They have carotenoids, um golden brown pigment and they use mannitol and lamb in Aaron as their food storage energy storage molecules. And finally we have santa fights. These are yellow green algae and they have different pigment. They do use chlorophyll A. And B. But they also have carotenoids and santa fill seeing their name there. So they have different pigments and they actually use fats and glucose in to store energy. So it becomes pretty clear looking at these different bits of evidence that it is choice. B. The green algae tariff fights that are the most closely related to modern plants. See you in the next video