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
Diano4ka-milaya [45]
3 years ago
15

A scientist observes fossil evidence that leads her to believe that certain organisms have a common ancestor.

Biology
2 answers:
FinnZ [79.3K]3 years ago
8 0

The correct answer is - She observed a fossil with skeletal structures similar to certain modern organisms.

The scientists was able to come to the conclusion that certain organisms have common ancestor because she was able to study and see the skeletal structures of extinct species and compare them with modern day species, and they had a big resemblance.

The skeletal structure is something that needs a lot of time to change, millions of years. Even then, the basics of the structure will be the same, with the further modifications in place on top of it. It is something that is very useful when comparing extinct species and modern day species, as it can give a nice clue about their connection and common ancestry.

The cats for example, the modern day ones and the first ones that appeared, have almost the same bone structure, where even a trained eye finds it hard to find a difference, and that is a very nice clue about tracing the ancestry.

Ad libitum [116K]3 years ago
4 0
Sorry I'm so late in answering this, but the answer should be the third one, "She observed<span> a fossil with skeletal structures similar to certain modern organisms."</span>
You might be interested in
All organisms perform _____, whether or not oxygen is present.
bekas [8.4K]

Answer: Glycolysis

Explanation:

Glycolysis is an universal process which takes place in all the organism from bacteria to humans. It can occur whether oxygen is present or not. It is the first step of cellular respiration that takes place in cytosol.

During glycolysis, breakdown of the glucose into pyruvate occurs with the formation of two energy molecules of ATP and two NADH molecules.

Thus, the correct answer is option (A).

7 0
3 years ago
BRAINLIESTTT ASAP!!!<br><br> Give a detailed description of a dafofill flower.
icang [17]

Daffodil Flower

.These are signs that Spring has arrived

.Yellow or white with 6 petals

.Is supposed to bring happiness when given as a gift

.Symbolizing Rebirth and New beginnings

.Is forced to bloom in New Year

.March birth flower

.Will bring good luck to your home (According to China)

3 0
3 years ago
Which hormone does the sympathetic nervous system release to increase heart rate.
sertanlavr [38]

The sympathetic nervous system releases hormones known as catecholamines which increase the heart rate.

<h3>What is a heart rate? </h3>

it is the number of contractions of the heart per minute.

<h3>What are catecholamines?</h3>

These are the neurotransmitters that have a catechol and a side chain that is an amine.

<h3>Which catecholamines are released by the sympathetic nervous system?</h3>

Epinephrine and norepinephrine are the catecholamines that are released by the sympathetic nervous system to increase the heart rate.

<h3>Where are these hormones released?</h3>

These hormones are released in the blood.

<h3>How does this hormone increase the heart rate?</h3>
  • "These hormones are released at the neuromuscular junction of the cardiac nerves."
  • "They shorten the repolarization period."
  • This speeds up the rate of depolarization and contraction and thus the heart rate is increased.

To learn more about sympathetic nervous system, hormones and heart rate here,

brainly.com/question/1155838

#SPJ2

8 0
2 years ago
Read 2 more answers
several species of warblers (bird) live in different areas of the same tree . this phenomenon is known as
Gekata [30.6K]

Answer:

This phenomenon is called Niche Differentiation, it happens when several species live in the same area but different parts. Hope that helps! :)

6 0
3 years ago
Data Analysis
salantis [7]

Answer:

C) none of the species would survive

Explanation:

clam  only goes down to a pH of 4.5

5 0
3 years ago
Read 2 more answers
Other questions:
  • In what ways has the atmosphere helped make Earth's environment more stable?
    7·1 answer
  • There are 92 naturally occurring how does this relate to the number of compounds?
    9·1 answer
  • Which group is incorrectly paired with its description?
    15·1 answer
  • What important mathematical manipulations should be performed on qualitative data?
    13·1 answer
  • In what part of a chlorplast does the calvin cycle occur
    14·1 answer
  • The volume of Uranius is less than 1/10 of the volume of Saturn
    11·1 answer
  • 1. Nutrients flow and energy cycles in an ecosystem.<br> о<br> True<br> False
    7·1 answer
  • 1. Most students in Britain take the GCSE when ____________.
    14·1 answer
  • CO2 is an example of which type of bond?<br> metallic<br> ionic<br> covalent<br> O polar bonding
    7·1 answer
  • Insufficient iodine will result in the anterior pituitary producing an excess of ______. Multiple choice question.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!