Answer:
Cephalopods
Explanation:
Cephalopods are mollusk of the class Cephalopoda, which includes squid, cuttlefish, octopus, nautiloids etc. Cephalopods are invertebrate marine animals that possess streamlined soft bodies, a large head and eyes, and numerous feet (called arms or tentacles) which is about eight or ten in most forms but about 90 in Nautilus. There are several species (about 800) of Cephalopods. Cephalopods have a more oxygen-efficient closed circulatory system, and they are well-adapted to fast swimming in the pelagic zone of the ocean.
II and III only. The Cambrian Period is the first geological time period of the Paleozoic Era. And the longest unit in geological time is the supereon.
The conservation of tillage practices leads to agricultural sustainability by protecting the farmer's crops from insects and other pests, thus, it reduces the need for the farmers to buy pesticides for the crops, since the tillage method prevents insects.
Answer: No
Explanation: Exotic and invasive species are two types of non-native species, which are introduced to ecosystems by natural processes or humans. Most exotic species are domestic, and they do not harm ecosystems. But, invasive species are harmful to the ecosystems.
