question: The Bilateria or bilaterians, or triploblasts, are animals with bilateral symmetry, i.e., they have a head ("anterior") and a tail ("posterior") as well as a back ("dorsal") and a belly ("ventral"); therefore they also have a left side and a right side. In contrast, radially symmetrical animals like jellyfish have a topside and a downside, but no identifiable front or back.

The bilateria are a major group of animals, including the majority of phyla but not sponges, cnidarians, placozoans and ctenophores. For the most part, bilateral embryos are triploblastic, having three germ layers: endoderm, mesoderm, and ectoderm. Nearly all are bilaterally symmetrical, or approximately so; the most notable exception is the echinoderms, which achieve near-radial symmetry as adults, but are bilaterally symmetrical as larvae.

Except for a few phyla (i.e. flatworms and gnathostomulids), bilaterians have complete digestive tracts with a separate mouth and anus. Some bilaterians lack body cavities (acoelomates, i.e. Platyhelminthes, Gastrotricha and Gnathostomulida), while others display primary body cavities (deriving from the blastocoel, as pseudocoel) or secondary cavities (that appear "de novo", for example the coelom).

The hypothetical most recent common ancestor of all bilateria is termed the "Urbilaterian". The nature of the first bilaterian is a matter of debate. One side suggests that acoelomates gave rise to the other groups (planuloid-aceloid hypothesis by Graff, Metchnikoff, Hyman, or ), while the other poses that the first bilaterian was a coelomate organism and the main acoelomate phyla (flatworms and gastrotrichs) have lost body cavities secondarily (the Archicoelomata hypothesis and its variations such as the Gastrea by Haeckel or Sedgwick, the Bilaterosgastrea by Gosta Jagersten , or the Trochaea by Nielsen).
1. what is this article about?
2. are they considered animals?
3. are sponges part of them?
4. what else are they called?
5. or?
6. what is the scientific name for the tail?
7. what about belly?
8. do they have a head?
9. what is the other word for head?
10. do all of them have a separate mouth and anus?
11. what has germ layers?
12. how many layers?
13. please name them
14. what is the most recent ancestor called?
15. is there anything that doesn't have a front or back?
16. what?
17. what do they have?
18. give me examples of phyla please.
19. do they have a digestive tract?
20. are all the bilateria bilaterally symmetrical?
****
answer: 1. The bilateria
2. Yes
3. No
4. bilaterians,
5. triploblasts
6. posterior
7. ventral
8. Yes
9. anterior
10. yes
11. bilateral embryos
12. Three
13. endoderm, mesoderm, and ectoderm
14. the "Urbilaterian".
15. Yes
16. jellyfish
17. a topside and a downside
18. flatworms and gnathostomulids
19. No
20. Not all

CHAPTER XV.

BERT COMES BACK.

One raw March evening, when the wind was roaring among the gray branches of the maples like a lion in wrath, some one knocked on the door.

"Come in!" shouted Anson, who was giving baby her regular ride on his boots.

"Come in!" added Flaxen.

Gearheart walked in slowly, closed the door behind his back, and stood devouring the cheerful scene. He was poorly dressed and wore a wide, limp hat; they did not know him till he bared his head.

"Bert!" yelled Anson, tossing the baby to his shoulder and leaping toward his chum, tramping and shaking and clapping like a madman, scaring the child.

"My gosh-all-hemlock! I'm glad to see ye! Gimme that paw again. Come to the fire. This is Flaxie" (as though he had not had his eyes on her face all the time). "Be'n sick?"

Bert's hollow cough prompted this question.

"Yes. Had some kind of a fever down in Arizony. Oh, I'm all right now," he added in reply to an anxious look from Flaxen.

"An' this is----"

"Baby--Elsie," she replied, putting a finishing touch to the little one's dress, mother-like.

"Where's he?" he asked a little later.

Anson replied with a little gesture, which silenced Bert at the same time that it explained. And when Flaxen was busy a few moments later, Anson said:

"Gone up the spout."

At the table they grew quite gay, talking over old times, and Bert's pale face grew rosier, catching a reflection of the happy faces opposite. What are the answers to this following set of questions: 1. Who had a baby?
2. Who was not dressed well?
3. Was he wearing a something on his head?
4. What?
5. Did they recognize him at first?
6. At what point did they know it was him?
7. What was the baby's name?
8. And what was she wearing?
9. Was Bert's face tanned?
10. Was the mood as they spoke at the table happy?
11. Did more than one person say, "Come in" at the beginning?
12. Who said it?
13. Was the story set in the month of May?
14. What month?
15. Did Gearheart leave the door open?
16. What was Gearheart's first name?
17. Had Bert been ill?
18. How?
19. In what state?
20. Did Anson frighten the baby when he saw Bert?
Answer: 1. Anson
2. Gearheart
3. yes
4. wide, limp hat
5. no
6. when he bared his head
7. Elsie
8. dress
9. unknown
10. yes
11. yes
12. Anson and Flaxen
13. no
14. March
15. no
16. Bert
17. "Yes
18. Had some kind of a fever
19. Arizony
20. yes

input: Make use of the article to answer the questions. The United States Department of the Interior (DOI) is the United States federal executive department of the U.S. government responsible for the management and conservation of most federal land and natural resources, and the administration of programs relating to Native Americans, Alaska Natives, Native Hawaiians, territorial affairs, and insular areas of the United States. About 75% of federal public land is managed by the department, with most of the remainder managed by the United States Department of Agriculture's United States Forest Service.

The Department is administered by the United States Secretary of the Interior, who is a member of the Cabinet of the President. The current Secretary is Ryan Zinke. The Inspector General position is currently vacant, with Mary Kendall serving as acting Inspector General.

Despite its name, the Department of the Interior has a different role from that of the interior ministries of other nations, which are usually responsible for police matters and internal security. In the United States, national security and immigration functions are performed by the Department of Homeland Security primarily and the Department of Justice secondarily.

The Department of the Interior has often been humorously called "The Department of Everything Else" because of its broad range of responsibilities. 1. What is also known as the Department of Everything Else
2. Is that meant in jest?
3. Why would someone refer to it that way?
4. Is there an abbreviation for this branch?
5. What percent of US property do they care for?
6. What about the other 25%?
7. What public official runs the DOI?
8. Who holds that spot right now?
9. What relevant position is not filled by anyone right now?
10. What does Mary Kendall do?
11. How old is she?
numbered_answers:
1. The Department of the Interior
2. Yes.
3. Because of its broad range of responsibilities.
4. DOI
5. About 75%.
6. Managed by the Department of Agriculture
7. Secretary of the Interior
8. Ryan Zinke.
9. The Inspector General position.
10. Serving as acting Inspector General.
11. unknown