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
AnnZ [28]
3 years ago
6

This is 7th grade science plz help

Biology
1 answer:
Darya [45]3 years ago
4 0
The best estimate for Earth's age is based on radiometric dating of fragments from the Canyon Diablo iron meteorite. From the fragments, scientist calculated the relative abundances of elements that formed as radioactive uranium decayed over billions of years. 
You might be interested in
Which adaptation is not an example of a structural adaptation?
valentina_108 [34]
A bear hibernating...
8 0
3 years ago
Read 2 more answers
In the plant kingdom, all the different species are descended from a single common ancestor. What is the correct term that descr
Nikitich [7]

Answer:

yes

Explanation:

lol, lol

7 0
3 years ago
Chronic exposure to nicotine desensitizes _______ receptors in the midbrain.
Nikitich [7]
<h2>Nicotinic ACh</h2>

Explanation:

  • They serve differing and regularly basic capacities all through the focal and fringe sensory systems, and have developing jobs in non-neuronal systems, .  
  • The synapse acetylcholine (ACh) can direct neuronal edginess by following up on the cys-circle cation-leading ligand-gated nicotinic ACh receptor channels (nAChRs).
  • These receptors are broadly disseminated all through the focal sensory system, being communicated on neurons and non-neuronal cells, where they take part in an assortment of physiological reactions, for example, uneasiness, the focal handling of torment, nourishment consumption, nicotine looking for conduct, and psychological capacities.
  • In the mammalian cerebrum, nine distinct subunits have been discovered up to this point, which amass into pentameric edifices with much subunit decent variety; anyway the α7 and α4β2 subtypes prevail in the CNS.

6 0
2 years ago
Why is everyone pretending Mrs. Dodds didn't exist?
frosja888 [35]

Answer:

It was a prank

Explanation:

everyone decided to prank percy and act like mrs dodds didnt exist

7 0
3 years ago
What are 3 domains of organism?
Galina-37 [17]

Answer:

Archaea, Bacteria, and Eukarya

4 0
2 years ago
Read 2 more answers
Other questions:
  • what region of the brain is responsible for complex thinking such as memory, speech, emotion, planning, and reasoning
    13·1 answer
  • Sister chromatids are structures that contain identical condensed copies of DNA .
    13·2 answers
  • Female cones produce what? Which contain eggs
    12·2 answers
  • Which outcome would you expect when water is removed from an aquifer faster than it is replaced on a regular basis?
    9·1 answer
  • DIS ADVANTAGES OF CLONING
    7·1 answer
  • ATP is the molecule that is used to provide energy necessary to power cellular functions, and as a result, it is often called th
    12·1 answer
  • Whoever answers can you please explain
    14·1 answer
  • How to set up dihybrid squares
    12·1 answer
  • 1
    14·2 answers
  • How can I study quickly​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!