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
Reika [66]
3 years ago
9

How does the amount of uranium in zircon tell us how old the crystal is?

Biology
1 answer:
Aleks04 [339]3 years ago
5 0
Uranium- lead which is the oldest & one of the most <span>refined of the </span>radiometric dating<span> schemes</span>
You might be interested in
The area of the muscle fiber where the actin and myosin myofilaments overlap is
Varvara68 [4.7K]

Answer:

Sarcomere

Explanation:

The muscle fiber / myofibrils consist of 2 types of filaments - actin and myosin. The myosin filaments are thick filament whereas the actin filaments are the thin filament.

In addition to this, the muscles have A-band and I-bands. These bands give the muscles alternate light and dark colour band structure. In the A-band, myosin filaments are present, whereas in the I - band the actin filaments are found.

In I-band 2 Z-lines are located.  The area between the Z-lines is called sarcomere. In this sarcomere region both actin and myosin filaments present.

When muscles get contracted the length of the sarcomere shorten. The actin and myosin filaments overlap in this area. A cross-bridge form between them, with the help of filamentous protein titin.

8 0
3 years ago
Explain in detail, the flow of blood through the heart. Someone please help
Serggg [28]

As the heart beats, it pumps blood through a system of blood vessels, called the circulatory system. The vessels are elastic, muscular tubes that carry blood to every part of the body.

Blood is essential. In addition to carrying oxygen from the lungs and nutrients to your body's tissues, it also takes the body's waste, including carbon dioxide, away from the tissues. This is necessary to sustain life and promote the health of all the body's tissues.


8 0
3 years ago
Luteinizing hormone is bound to transport proteins in the plasma. <br> a. True<br> b. False
Tanzania [10]

Answer:

FALSE

Explanation:

Luteinizing hormone, also known as the lutropin, is a heterodimeric glycoprotein produced by the gonadotropic cells of the anterior pituitary gland.

The function of the luteinizing hormone in males is the secretion of the progesterone hormone. Whereas, in females, the acute rise of this hormone triggers ovulation, maintains the corpus luteum and is also responsible for the secretion of progesterone hormone.            

4 0
3 years ago
Creators who "level" communicate purposefully, honestly, and responsibly.
vredina [299]
<span>This is incredibly true. The top way to level up, or receive a promotion, is to have proper communication. The three most important things to keep in mind to have effective communication so you may move forward is to be purposeful, be responsible in what and how you communicate, and to always be honest and up front.</span>
7 0
3 years ago
Most maerials do what when there heated
8090 [49]
Some materials contract when heated rather then expand as most materials do.
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is A gas that is released into the air and soil during the process of breathing and decomposition
    12·1 answer
  • Which of the following represents an ion? (1 point)
    9·1 answer
  • Steady slate what the human body strives to maintain
    5·1 answer
  • The American colonists' seven-year fight for independence from Great Britain waIs called?
    6·1 answer
  • Which is showing passive transport and which is active transport?
    13·1 answer
  • How does an eclipse occur?
    12·1 answer
  • Modern organisms in similar environments often have similar physical
    10·1 answer
  • 7. Explain how magnetic potential energy can be transformed into kinetic energy. ​
    15·1 answer
  • Genes are specific sections of?​
    13·2 answers
  • Differentiate between macro and micro farm animals ​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!