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
Alona [7]
3 years ago
12

PLEASE HELP ASAP

Biology
1 answer:
snow_lady [41]3 years ago
4 0

Answer:

A) Devonian

Explanation:

Fourth division of the Paleozoic era, the Devonian (or Devonian) comprises the period between 416 and 354 million years ago, succeeding the Silurian and preceding the Carboniferous.

Although in this period the terrestrial environment is increasingly conducive to life, the Devonian is still known as the "age of fish". During this period, the first vertebrae, sharks, lobed-fin fish, ray-finned fish and placodermos (group of fish with armor that took the top of the food chain) emerged. Some freshwater fish developed lungs, which gave them the ability to breathe out of the water - soon the first amphibians would originate from fish with lobed fins. On the continents, however, animal life was still marked by the presence of arthropods, such as arachnids and insects.

You might be interested in
Rotation of a planet causes?
allsm [11]

Answer:

Scientists believe the counterclockwise rotation of the planets is caused by the way they formed in the debris field. Each planet may tilt at an angle from the direct north/south pole, causing seasons to occur. The planetary tilting does not change the basic nature of the planet rotation.

Explanation:

8 0
3 years ago
Read 2 more answers
Pollution stays in the area where it is produced.<br> a. True<br> b. False
Studentka2010 [4]
False, because if it is air pollution, the polluted particles diffuse in the air and then travels. In addition, for noise pollution, sound waves travel!
6 0
3 years ago
Where in a data table should units of measurement be shown?
Aleksandr-060686 [28]

Answer:

In a data table, units of measurement should be indicated in the headings of the columns where the data values are listed. This shows that the indicated unit applies to all the data values listed in the column.

7 0
3 years ago
Read 2 more answers
A crop is treated with a pesticide and 98% of the insects are killed. what will most likely happen to the remaining insects?
Marina CMI [18]

The 2% of the insects will begin to reproduce and grow their population exponentially and in time enable the population to recover. This is if the population is large enough to enable random mating. The 98% reduction in population drastically reduces competition for the remaining individuals hence giving them abundant resources for them to thrive.   






3 0
3 years ago
(what organelle is this) Passive transport is taking place across this thin cell covering causing the muscle cells to contract.
deff fn [24]

Answer:

This question appears incomplete

Explanation:

This question appears incomplete. However, <u>the cell organelle involved in transportation of molecules in the cell is the </u><u>cell membrane</u>. This cell membrane can be said to be cause of several forms of transportation in and out of the cell - this is because the membrane is a selective barrier. While some substances/molecules move through diffusion by moving with the concentration gradient (as in the case of passive transport, others move against the concentration gradient requiring energy to cause the transportation (as in the case of active transport).

7 0
3 years ago
Other questions:
  • In cellular respiration, where do the high-energy electrons that move through the electron transport chain originate?
    5·2 answers
  • Ice floats in water because it _____.
    5·2 answers
  • A fire in the Everglades damages a large area. A forest fire in Alaska of the same size experiences similar damages. Which ecosy
    6·2 answers
  • How many legs does a spider have?
    15·1 answer
  • why is it important that ions being transported across a cell membrane be shielded from the interior of the lipid bilayer
    13·1 answer
  • Please answer this:)) :((​
    12·1 answer
  • Suppose that the concentration of Ca outside the cell is 10 and inside the cell is 0.1 mmol/liter. The Nernst equation at 20oC i
    8·1 answer
  • Hello everyone! I hope you have an amazing rest of your week.
    7·1 answer
  • Can you think of any animals that undergo metamorphosis ?
    14·2 answers
  • What is the difference between a nonliving specimen and one that<br> a<br> you<br> considered dead?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!