Answer:
Cysticercus
Explanation:
Cysticercus is known as the larval form of tapeworm. The structure of cysticercus comprises of a sac filled with fluid. Since tapeworm is a parasite, its larva is found within the tissue of the host.
The larva of tapeworm is also harmful as a full grown adult as it causes cysticercosis in humans which causes mild abdominal symptoms and infection that causes passage of proglottids in the stool
Answer:
Angiosperms have seeds with an 3n endosperm due to double fertilization.
Explanation:
- Double fertilization is found only in flowering plants.
- In angiosperms, the female gametophyte does not grow after reaching eight nucleate stage.
- After fertilization and triple fusion, the zygote and primary endosperm are created and further growth of embryo sac continues.
- Triple fusion is the fusion of two haploid polar nuclei of female gametophyte and one male nuclei. This results in a 3n nucleus.
- The developing embryo obtains nutrition from the endosperm.
- If fertilization fails no endosperm is formed.
Some dinosaur only ate plants and no meat. As plants became extinct the dinosaur who ate plants couldn’t get the food they need so they starved.
