This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which period begins three weeks after conception? the embryonic period the fetal period the ... (Read 145 times)

stevenposner

  • Hero Member
  • *****
  • Posts: 608
on: Jun 22, 2018
Which period begins three weeks after conception?
 
  the embryonic period
  the fetal period
  the gestational period
  the germinal period

Question 2

Which of the following structures is the first sign of a human body forming during the embryonic period?
 
  the neural tube
  the spinal cord
  the primitive streak
  the blood vessels


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

xiaomengxian

  • Sr. Member
  • ****
  • Posts: 311
Reply #1 on: Jun 22, 2018
Answer to Question 1

the embryonic period

Answer to Question 2

the primitive streak


stevenposner

  • Member
  • Posts: 608
Reply 2 on: Jun 22, 2018
Great answer, keep it coming :)

atrochim

  • Member
  • Posts: 331
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Roe deer fawn, two to three weeks old. Roe deer fawn, two to three weeks old.
Facial Malformations in Fetal Alcohol Syndrome Facial Malformations in Fetal Alcohol Syndrome
This girl’s photo illustrates the main features of fetal alcohol syndrome, including a flat nasal ... This girl’s photo illustrates the main features of fetal alcohol syndrome, including a flat nasal ...
Secondary response begins more rapidly after exposure to antigen, produces more antibodies, and ... Secondary response begins more rapidly after exposure to antigen, produces more antibodies, and ...
Triassic Period Triassic Period
Fetal alcohol syndrome Fetal alcohol syndrome
Video: Nucleic acid digestion -small intestine

For a complete list of videos, visit our video library