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
olga_2 [115]
3 years ago
5

Why have fossil's of some extinct organisms have been found and others haven't?

Biology
1 answer:
xz_007 [3.2K]3 years ago
7 0
Fossils only form if certain qualifications are met, and some organisms cannot meet them, so they just cease to exist, not a single sign of them. This could happen if they were organisms that decayed completely. Fossilization can include freezing, drying, and encasement, usually in tar or resin.
You might be interested in
What is cloning in plants? Please don't post inappropriate answers.​
lisabon 2012 [21]

Answer:

hope it helps..

Explanation:

This is a process of taking part of a healthy plant, replanting it, and having it grow. Since cloning is a form of asexual plant reproduction–meaning only one 'set' of DNA–the resulting clones are an exact replica of the parent plant.

3 0
3 years ago
About half of all babies are able to walk independently by __________ months of age.
Liono4ka [1.6K]
I think that about half of all babies are able to walk independently by 12 month of age. It said that babies tend to take their first steps from the age of 9. Babies usually start to crawl before they can walk. This is because their arm are usually more effective. After crawling they learn to stand up with their feet first and later learn to walk while holding things. The next step after that is walking. 
Not all babies walk at the same time. There those that learn before the other so there is no need to worry if your child does not walk by 12 months.
7 0
3 years ago
What is the structure of a stem
erica [24]
Vascular tissue composed of xylem<span> (red) and </span>phloem<span> tissue (green, between the</span>xylem<span> and </span>cortex<span>) surrounds the pith. Collenchyma cells are elongated cells with unevenly-thickened walls . They provide structural support, mainly to the stem and leaves.</span>
3 0
3 years ago
A.What patterns do you notice in how the airborne pathogen spreads
RSB [31]
Answer:
             Air born pathogens are minute creatures responsible for causing a variety of illness. These pathogens may be bacteria, virus or fungi and spread through a variety of mechanism. When an infected person sneeze, respiratory droplets add into air. These infectious droplets when inhaled by a healthy person he become ill.Example is flue virus.
 

6 0
3 years ago
Earth's early atmosphere was primarily composed of
Paul [167]

Answer:

The correct answer is ''carbon dioxide, water vapor and nitrogen.''

Explanation:

About 4.5 billion years ago, Earth was a very geologically active planet. So many volcanic fumes formed the primitive atmosphere, which was mostly made up of water vapor, carbon dioxide, sulfur, and nitrogen. At this point, oxygen was barely present and the oceans did not yet exist. The primitive atmosphere is the one before the Precambrian, it was reductive, that is, it lacked free oxygen, and only had ammonia, methane and hydrogen, the high temperature of the atmosphere in its early stages facilitated the reaction of these gases to form organic compounds from which life may have emerged. UV rays passed, because ozone did not exist.

5 0
3 years ago
Other questions:
  • In the steps of the scientific method, what is the next step after formulating a hypothesis?
    9·1 answer
  • Now that you have learned about indicator solutions, write a hypothesis to answer the lesson question, “What macromolecules are
    15·2 answers
  • Which word best describes Closeness to the true value
    9·2 answers
  • What does homeostasis regulate
    8·2 answers
  • During which phase in erythrocyte development does the color of hemoglobin overcome the color of the stained ribosomes?
    9·1 answer
  • How to invasive plants effect negatively and how does removing them effect is positively
    11·1 answer
  • Eukaryotic mitochondria and chloroplasts divide by this process.
    10·1 answer
  • (20 points) {Brianliest} pls help meeeee
    8·2 answers
  • A car slows from 60 mi/hr to 25 mi/hr is this speed, velocity, or acceleration.:)
    7·2 answers
  • Please help I will give brainalist
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!