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
Alika [10]
3 years ago
15

Which of these scenarios is an example of natural selection?

Biology
2 answers:
Goshia [24]3 years ago
5 0

Answer:

C

Explanation:

dedylja [7]3 years ago
5 0

Answer:

C. Giraffes with longer necks survive the dry season by eating leaves from the tops of trees. Those giraffes breed more successfully that year.

Explanation:

You might be interested in
Describe several ways of explaining the characteristics of minerals
Natalija [7]

there are many ways of explaining the characteristics of mineral

1. mineral are natural

2.mineral are inorganic

3. minerals are solid

4. definite  chemical composition

5. crystalline structure

5 0
3 years ago
Describe the key features of the Watson-Crick model for DNA structure.
vagabundo [1.1K]

Answer:

Watson and Crick proposed the double helical model of DNA.

Explanation:

- This model says that DNA exist as double helix. It has two polynucelotide strands running in opposite direction i.e the strands are anti-parallel.

- Each polynucleotide strand is made up of several nucleotide liknked together by phophodiester bonds.

- The two strands are not coiled upon each other but the double strand is coiled upon itself around a common axis like the spiral stair case. Here base pairs forms the stairs and backbone of two strands form railing. Back bone contains sugar and phosphate.

- The base pairing is specific, adenine always pairs with thymine and guanine always pairs with cytosine. Thus if we see any base pair, it consists of one purine and one pyrimidine.

- The two strands of DNA thus show complementary base pairing.

- The strands are held together because of hydrogen bonding between the bases in opposite strand.

- One full helical turn involves ten base pairs and the base pairs are stacked  3.4 A apart.

- This form is called as B-form of DNA.

5 0
3 years ago
What surrounds all cells?​
Alecsey [184]

Answer:

All cells are surrounded by a cell membrane. The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others.

Explanation:

6 0
3 years ago
DNA, the genetic material of living organisms, is damaged by light in the
insens350 [35]

Answer:

The correct option is <em>B) ultraviolet region, especially below a wavelength of 320 nm.</em>

Explanation:

Ultraviolet light carries an enormous amount of energy in it. It is invisible to the human eye. When UV light with enormous energy and wavelength lesser than 320nm, hits the DNA, it causes changes in the structure of the DNA. Mostly, it affects the thymine nitrogenous base regions and forms pyrimidine dimers. The structure of the DNA changes on all the sites where dimers form and hence, they cannot be properly transcribed.

6 0
3 years ago
The food plants is...<br><br> A. Carbon dioxide <br> B. Oxygen<br> C. Water<br> D. Glucose
xxTIMURxx [149]
Your answer is carbon dioxide because Chlorophyll can make food the plant can use from carbon dioxide, water, nutrients, and energy from sunlight. ... During the process of photosynthesis, plants release oxygen into the air.

I hope this helps
5 0
3 years ago
Other questions:
  • How many electron orbital shells does chlorine have?
    5·2 answers
  • An experiment is performed to test the effect of three different types of water on the growth of a plant. The test is done by us
    9·1 answer
  • What structures are included in the level or organization called cells?
    13·1 answer
  • Organisms such as plants that make their own food are called
    11·1 answer
  • Living organisms are made up of cells. Cells are organized at different levels to form very complex living organisms like your b
    12·2 answers
  • Worth 26 points! Help me please! Do 1,2,3 by filling in the blank!!!! And I will make you brainest!
    7·2 answers
  • Why is it important to have maps of the ocean floor, such as those gathered with SeaBeam technology
    10·1 answer
  • Beginning with the smallest level, the levels of organization of the body are:
    14·1 answer
  • What is the purpose of cell division after fertilization?
    15·1 answer
  • Which of the following is an example of a chemical change?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!