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
IrinaK [193]
3 years ago
15

Which is true concerning how fossils are used as evidence?

Biology
2 answers:
Olenka [21]3 years ago
3 0

Answer:

A ko false B ko true C ko false D ko true

Lana71 [14]3 years ago
3 0

Answer:

D

Explanation:

You might be interested in
How much methane may be locked up in sediments containing gas hydrates ?
ryzh [129]
20 quadrillion cubic meters

this is a very late answer but i'm sure that it's correct xD
7 0
3 years ago
im freaking out how can i hear my thoughts if i cant see them hear them or read them? WHAT IS THINKING?!?! am i over reacting? H
pentagon [3]

Answer:

yes, you're overreacting. -w-

Explanation:

8 0
3 years ago
Which kingdom is completely off unicellular organisms that are prokaryotic
Andreas93 [3]

Answer:

Eubacteria

Explanation:

3 0
3 years ago
What do you learn about global water supplies? <br> pasagot po ng tama thank uu
max2010maxim [7]

Answer:

1. Most water we use goes to agriculture

Agriculture places significant pressure on the world's fresh water, accounting for nearly 70% of all water withdrawals. That number can rise to more than 90% in countries like Pakistan where farming is most intensive. Unless substantial efforts are made to reduce food waste and increase the water-use productivity of farming – to get more “crop per drop” – water demands in the agricultural sector are projected to increase in the coming years to keep up with population growth.

Explanation:hope you like this

6 0
2 years ago
A number of marine reptiles and birds have salt glands, which have a remarkable ability to concentrate salt solutions for excret
Lemur [1.5K]

Answer:

A)100mL  B)50mL  C)The second option  D)Hypoosmotic Environment

Explanation:

The average Na concentration in the seas and oceans of the world is around 3,5% which mean that in 100 ml of sea water, there is around 3,5 grams of Na.

The weight of one mol of NaCl is 58,44 grams. For 3,5 grams of NaCl, we get 3,5/58,44 = 0,060 mol of NaCl which is 0,060x1000 = 60 mmol/100ml. According to this and the information given in the question about the secretion of the salt glands', if the average sodium concentration is 600mmol/L, we have 60*10 = 600mmol/L so it would take 100 mililiters of water to excrete.

If the average Na concentration of the salt gland's secretion were 300 mmol/L, only 50 mililiters of water would be needed to excrete the same sodium load.

The second option of secretion is hyperosmotic to seawater because the concentration is higher.

Osmoregulation is the process of balancing the amount of water and salt between the body of the organism and its surrounding environment. For salt glands to be advantageous for osmoregulation, they need to be in a hypoosmotic environment.

I hope this answer helps.

3 0
3 years ago
Other questions:
  • Explain the significance of complementary base pairing in the conservation of the base sequence of DNA.
    6·1 answer
  • Breathing rate is constantly being monitored and adjusted in the human body which result in
    14·2 answers
  • How do scientists indetify a virus
    9·1 answer
  • Which two microscopes generate three-dimensional images
    9·1 answer
  • What is a group of organisms called
    7·1 answer
  • During high tide in the Bay of Fundy, Canada, the tide rises more than an inch per minute. Which of the following factors are re
    11·2 answers
  • Which molecule would be the most affected by limited nitrogen?
    15·1 answer
  • What is osmosis and how does it affect cells 2 examples
    13·2 answers
  • Which of the following is a concept of the cell theory? A. Only higher organisms are composed of cells. B. A cell is the basic s
    9·1 answer
  • How did Darwin disprove Lamarck? Explain why Darwin still thought that Lamarck’s idea was very important.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!