Answer the following question given this paragraph: 22.11.5 Pyrrophytes Pyrrophytes are unicellular, photosynthetic, and mostly aquatic. They have protective coats composed of stiff cellulose. They are more easily identifiable, due to the presence of two flagellae. The longer flagellae propels the dinoflagellate, while the second shorter, flatter flagellae functions as a rudder. Some species of pyrrophytes are zooxanthellae. Since they lack cellulose plates, they make their home in coral reefs and animals, such as sea anemones, and molluscs. In returning the favour of sheltering them, dinoflagellates provide carbohydrates to their host through photosynthesis. This is why there are nutrient-rich coral reefs in malnutritions water. A negative aspect of pyrrophytes is that under certain conditions, species of dinoflagellates reproduce rapidly to form a harmful algal bloom (HAB), known as a red tide if dinoflagellates are the cause. Such pyrrophytes can produce toxins which may injure or kill wildlife, and additionally any consumers of contaminated wildlife. Q: What function does the longer flagellae perform in dinoflagellates? A:
OPTIONS:
- defends
- grasps
- attacks
- propels

Answer: propels

Answer the following question given this paragraph: Pollination occurs when pollen is transferred from a male to female cone. If sperm then travel from the pollen to an egg so fertilization can occur, a diploid zygote results. The zygote develops into an embryo within a seed, which forms from the ovule inside the female cone. If the seed germinates, it may grow into a mature sporophyte tree, which repeats the cycle. Q: If pollination occurs, what does the zygote develop into? A:
OPTIONS:
- an ovum
- a sperm
- an egg
- an embryo

Answer: an embryo

Answer the following question given this paragraph: Mesophyll makes up most of the leaf's interior. This is where photosynthesis occurs. Mesophyll consists mainly of parenchymal cells with chloroplasts. Q: What consists mainly of parenchymal cells with chloroplasts? A:
OPTIONS:
- periosteum
- chlorophyll
- mitochondria
- mesophyll

Answer:
mesophyll