« previous next »

Author Question: What do the simplest vertebrates lack? a. jaws b. notochord c. central nervous system d. teeth ... (Read 98 times)

nelaaney

  • Hero Member
  • *****
  • Posts: 560
on: Aug 22, 2018

What do the simplest vertebrates lack?
  a. jaws
  b. notochord


 

c. central nervous system
  d. teeth
  e. skull



Question 2

What is an invertebrate chordate?
  a. A chordate that has lost its gill slits
  b. A chordate with an underdeveloped dorsal nerve system
  c. A chordate that has lost its notochord
  d. A chordate that has a backbone
  e. A chordate that evolved to become an invertebrate



joshbk44

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Aug 22, 2018
Answer to Question 1

a

Answer to Question 2

c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

nelaaney

  • Hero Member
  • *****
  • Posts: 560
Reply #2 on: Aug 22, 2018
Both answers were spot on, thank you once again


joshbk44

  • Sr. Member
  • ****
  • Posts: 340
Reply #3 on: Aug 22, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Pink-eared Duck - At Central Park Zoo, New York, USA Pink-eared Duck - At Central Park Zoo, New York, USA
Orientation of the Central Engine and Its Jets Orientation of the Central Engine and Its Jets
Disorders of the Female Reproductive System Disorders of the Female Reproductive System
Components of the lymphatic system. Components of the lymphatic system.
The urinary system: Anterior view of the urinary organs of a female The urinary system: Anterior view of the urinary organs of a female
Male Reproductive System - Semen Male Reproductive System - Semen
Video: Stress and Immune System Animation

For a complete list of videos, visit our video library