As a final exam question in your biology course, you are asked to identify an animal that you immediately recognize as a chordat
e. Your instructor applauds you for your quick recognition of the phylum, but then he asks you to be more specific. You reply that the animal that you are observing is a craniate. To get an A, you must also tell your instructor how you came up with your answer. What features would you use to formulate your answer? A) Most craniates lack a functional jaw.
B) The anterior end of the nerve cord is elaborated to form a brain in craniates.
C) The brain is encased in a protective bony or cartilaginous housing in craniates.
D) Adult craniates lose most of their chordate characteristics.
E) A group of embryonic cells called the neural crest form on either side of the neural tube in craniates.
The brain is encased in a protective bony or cartilaginous housing in craniates.
The anterior end of the nerve cord is elaborated to form a brain in craniates.
Explanation: The craniates include the chordata with well-defined heads. This includes mammals, reptiles and fishes. So we can discard the other answers. Because most craniates have functional jaws, and the adults do not lose their chordate characteristics. The last one does not apply as a specific feature because the tunicate have neural crest but are not recognized as craniata.
The anterior end of the nerve cord is elaborated to form a brain in craniates.
The brain is encased in a protective bony or cartilaginous housing in craniates.
A group of embryonic cells called the neural crest form on either side of the neural tube in craniates
Craniates are members of the craniate monophyletic group of chordinates. <u>They have a distinct head , protected by the skull made of hard bone. Some are with cartilages.</u> The skull protects the brain, paired eyes, ears and other the sensory organs.
They have high metabolic demands, their cardiovascular systems is made up of heart with one to two chambers. Its pumps blood saturated with oxygen, carried by hemoglobin. They have kidney which maintain homeostasis
The answer is the Xist RNA, x-inactive specific transcript is a gene on the X chromosomes of the placental mammals that acts as a major effector of the X inactivation process. Non coding RNA is a functional RNA molecule that is transcribed from DNA but not translated into proteins.
The babys organs will start to develop, and the baby will be able to sleep and hear other people outside the womb, the bby starts to grow more essential things it will need to live outside of the mothers womb.
Layer that is 0.2 to 1.1 percent of Earth's total diameter is the thinnest layer of the Earth- Crust.
So, the correct answer is: oxygen and silicone. The crust consists of tectonic plates (in relative motion one from another) and has 5–70 km (~3–44 miles) in depth. The most abundant elements of this layer are: oxygen-46.6 percent by weight; silicon-27.7 percent; aluminum-8.1 percent; iron-5 percent.
Answer:1. They allow the movement of molecules from one cell to another, enabling communication between cells.
Explanation:the cell wall is a rigid and cellulose containing wall, which surrounds the plasma membrane.
During lignification, small pores appear on the cell wall through which cytoplasmic strands extend.these pores are the plasmodesmata,which provides connections between plant cells
