« previous next »

Author Question: The _____ is the inner layer of the embryo from which the lungs and digestive system develop. A) ... (Read 104 times)

LCritchfi

  • Hero Member
  • *****
  • Posts: 519
on: Jun 22, 2018
The _____ is the inner layer of the embryo from which the lungs and digestive system develop.
 
  A) neural tube
  B) mesoderm
  C) endoderm
  D) umbilical cord

Question 2

Which of the following is a difference between primary sex characteristics and secondary sex characteristics?
 
  A) The primary sex characteristics are physical indicators of sexual maturation, while the secondary sex characteristics trigger the development of sex hormones.
  B) The primary sex characteristics are structures that make reproduction possible, while the secondary sex characteristics are not directly involved in reproduction.
  C) The primary sex characteristics include breast development, while the secondary sex characteristics include the ovaries and testes.
  D) The primary sex characteristics respond to pituitary hormones, while the secondary sex characteristics do not respond to pituitary hormones.


enass

  • Sr. Member
  • ****
  • Posts: 380
Reply #1 on: Jun 22, 2018
Answer to Question 1

C

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

lower digestive lower digestive
Overview of factors affecting renin release: (a) activation of the sympathetic nervous system; (b) ... Overview of factors affecting renin release: (a) activation of the sympathetic nervous system; (b) ...
Pathology of the Digestive System Pathology of the Digestive System
The pressure valve maintains the system pressure and allows excess pressure to vent. The vacuum ... The pressure valve maintains the system pressure and allows excess pressure to vent. The vacuum ...
Vial Washing System - Risk Based Approach Vial Washing System - Risk Based Approach
Summary of the digestive activities Summary of the digestive activities
Video: Digestion Animation

For a complete list of videos, visit our video library