1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Annette [7]
3 years ago
8

Please help me

Biology
1 answer:
Alenkinab [10]3 years ago
8 0
Ostrich eggshell is composed of 96% crystalline calcite and 4% organic material, mostly proteins. The thickness is made up of three different layers that vary in structure and thickness. The hardness of the shell is 3 on the Mohs scale. Pretty solid!
You might be interested in
Cardiac muscle does not exhibit tetanus beacuse it has A. exclusively aerobic respiration. B. fast Ca2 channels. C. a long absol
Nina [5.8K]

Answer:

C, a long absolute refractory period.

Explanation:

Tetanus is not possible in cardiac muscle tissue because cardiac cells have longer action potentials and a very long refractory period compared to other cells. This helps prevent the heart from cramping and seizing up.

5 0
2 years ago
What conditions cause cells to break down fat molecules?
Alexeev081 [22]
Well, think of it this way.

When you do not eat that much, your body fat lowers little by little, but considering that this is a question, I'd say starvation. Think of it as when you fast (Not eating all night say to go to a doctors appointment) your body stores the fatty acids to make ketone! The ketone will build a bloodstream that flows to the brain and other parts of the body!

To sum it up, starvation.
7 0
3 years ago
When examining an endocrine cell from a new species of mammal under the microscope you find that it contains an abundance of rou
Simora [160]

Answer:

1. It secretes a peptide/protein hormone.

Explanation:

The above mentioned answer is more likely true for this question.

Because, rough endoplasmic reticulum is the cytoplasmic organelles which are involved in post-translational modification of peptide chains. After that, peptide chains are further modified (folded) in golgi apparatus. It's means that abundance of rough endoplasmic reticulum and golgi apparatus present in cells ensure the formation and secretion of peptide/protein hormones.

7 0
3 years ago
if you drop a piece of quartz it will break apart in an irregular manner which property dose quarz show in this situation
mezya [45]
The property is fracture
when there is a pattern, it is cleavage
8 0
3 years ago
A hypothetical population of 500 cats has two alleles, T and t, for a gene that codes for tail length. The table below presents
timama [110]

Answer:0.16

q^2 = 80/500 = 0.16

Explanation:

4 0
2 years ago
Other questions:
  • The phase of matter with atoms that are tightly packed and can only vibrate next to each other a Liquid b Plasma c Gas d Solid
    8·1 answer
  • PLEASE HELP! URGENT!
    15·1 answer
  • Name two ways that mitosis and meiosis are different
    7·2 answers
  • Wilma hires Fred, a contractor, to paint her house. When Fred finishes, Wilma refuses to pay him and states that the quality of
    14·1 answer
  • What is the independent variable in this experiment
    11·1 answer
  • How would exercising, sleeping well, eating healthy foods, and receiving recommended vaccines affect a person's immunity?
    9·2 answers
  • Plants take up carbon dioxide from the air and nutrients from the soil. This is an example of interactions between the
    15·1 answer
  • Pine
    11·1 answer
  • Please help do in five minutes please
    14·1 answer
  • HELP ME PLEASE ILL GIVE BRAINLY IF U GET IT RIGHT PLEASE!!!!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!