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
Alex73 [517]
3 years ago
6

I need help from 20-23

Biology
1 answer:
Mashcka [7]3 years ago
3 0
20. The answer is 1 (Precambrian)
21. The answer is 4 (Pennsylvanian)
22. The answer is 2 (Bony Fishes, Dinosaurs, and Mammals)
23. The answer is 2 (Reptiles)
You might be interested in
Darwin observed that organisms that were best able to survive and reproduce had adaptations that were...
11111nata11111 [884]

Answer:

A: Suited for their environment

Explanation:

You can automatically eliminate B and C, since they both say that animals with adaptations that won't work with their environment would have a higher survival rate. This doesn't make sense; adaptations that wouldn't suit an environment would actually lower the population's chances of reproduction and survival.
That leads us to A and D. However, A would be the correct answer. Organisms with adaptations that suited their environment would help them (since it would make the organism more compatible with their environment), rather than having no change at all.

Hope this helped!

5 0
2 years ago
Balanced chemical equations demonstrate
sergij07 [2.7K]
Hello there!


Your question states: Balanced chemical equations demonstrate 

The answer is B. The law of conservation of mass


Hope i helped!

Let me know if you need anything else!

~ Zoe
5 0
4 years ago
Which is an advantage of genetic engineering?
lesya [120]
<span>One of the advantages of genetic engineering is the ability to add vitamins and minerals supplements to food. The correct option is D. The other options given are disadvantages of genetic engineering. Apart from the advantages given here, genetic engineering has other merits, such as production of better agricultural products, increasing shelf life of products, elimination of diseases, etc.</span>
4 0
3 years ago
Read 2 more answers
6) What process is shown in the diagram
marusya05 [52]
Answer: B

Why? It is not A or D for many reasons but cell differentiation is used for very specific functions as cell determination is used for different embryonic functions. Based on the diagram I seems to me that it is not very specific so that’s why I think it’s B
(If it’s not be then is 100% C but B makes more sense)

Hope this helps

8 0
3 years ago
PLEASE HELP WILL MARK BRAINLIEST
Paul [167]

Answer:

repair the DNA

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which type of change would be more likely to have se­vere consequences—substitution or deletion? Why?
    9·1 answer
  • I’m Nobody by Emily Dickinson I'm Nobody! Who are you? Are you – Nobody – too? Then there's a pair of us! Don't tell! they'd ban
    8·2 answers
  • The hydrosphere is predominantly made of A. gaseous air. B. frozen water. C. solid rock. D. liquid water.
    14·2 answers
  • Properties that change when the size of an object changes are called
    5·1 answer
  • Please help!! Differences between oceanic and continental crusts influence how the plates interact with each other which of the
    15·2 answers
  • How does a frog use its legs while swimming
    5·1 answer
  • Enhancer I can stimulate the transcription of gene A, but the insulator blocks its effect on gene B Enhancer ll can stimulate th
    14·1 answer
  • What is the process that puts carbon dioxide back into the air? Its on a crossword puzzle and its not carbon respiration or the
    7·1 answer
  • What happens at the rate of a chemical when a catalyst present
    7·1 answer
  • Fruit flies use the Z-W sex determination system<br><br> True or false
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!