Answer:
jawless fish were earth 's first arthropods
Both the mushroom and the gecko are heterotrophs: they need to acquire their food from other sources. The tree, on the other hand, is an autotroph--it gains most of its nutritional needs through photosynthesis.
The answer is hypothalamus. The hypothalamus is a bit of the cerebrum that contains various little cores with an assortment of capacities. A standout amongst the most critical elements of the hypothalamus is to interface the sensory system to the endocrine framework by means of the pituitary organ.
The hormones from the hypothalamus represent physiologic capacities, for example, temperature direction, thirst, hunger, rest, inclination, sex drive, and the arrival of different hormones inside the body. This region of the cerebrum houses the pituitary organ and different organs in the body.
Uhhhhh I think it's plant cells!!
The digestive system of the earthworm consists of the alimentary canal and the digestive glands. the alimentary canal runs as a straight tube throughout the length of the body from the mouth to anus. the mouth opens into the buccal cavity which occupies the 1 and 2 segments