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
lubasha [3.4K]
3 years ago
8

Over the past 60 years, many amphibian species have experienced significant population declines and some species have become ext

inct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction.
Chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. In some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. If these resistant individuals continue to survive and prosper, new resistant populations might emerge. This would be an example of ______.
A. the founder effect
B. sexual selection
C. genetic drift
D. natural selection
E. artificial selection
Biology
1 answer:
sladkih [1.3K]3 years ago
7 0

Answer:C

Explanation:if the few surviving amphibians reproduce and their young ones too survives, then it is genetic drift

You might be interested in
List one statement from Daltons theory that has been disproven by later experiments and findings
AlladinOne [14]
Dalton's theory of atoms are invisible was later proven false. An atom can be further divided into protons, neutrons, and electrons.
Hope this helps!
3 0
3 years ago
The primary role of _____ is to bind animal cells together.
NNADVOKAT [17]
The primary role of DESMOSOME is to blind animal cells together. It is the formation of a structure from protein plaques in the cell membranes linked by filaments. This links to a the protein that is attached to the cell surface adhesion.
8 0
3 years ago
The cell membrane's function is to..
melisa1 [442]

Answer:

The first bullet point is correct

Explanation:

The cell membrane controls what comes in and out of the cell, it needs minerals so would not block them completely, and water does not enter cells so it is clearly the first one.

3 0
2 years ago
Some scientists reproduce, or grow, cells in a laboratory setting so they can study the cells for particular reasons. Research d
Shalnov [3]

<u>Cell culture i</u>s the method applied by scientists to grown, cells in the laboratory setting to study the cells for particular reasons.

Explanation:

Cell culture is basically a method for survival, reproduction etc which are done under controlled conditions in the space outside the environment. This is also used for data mining.

Purpose: Cell culture is used for propagation of virus

Advantages:

  • Vaccine production by replication of virus
  • Detection of viral cell of virus
  • Convenient easy and economical method

Disadvantages

  • Maintenance of sterile aseptic conditions.  
  • Increases microbial contamination
  • Cross contamination takes place
4 0
3 years ago
Which of the following properties of water help to explain why icebergs float in the ocean?
eduard
I think the best answer from the choices would be the first option. Icebergs float in the ocean since i<span>cebergs are composed of freshwater and freshwater is less dense then salt water. The ocean contains salts which contributes to its density which most likely would be higher with that of an iceberg.</span>
6 0
3 years ago
Other questions:
  • Every november, tens of thousands of sally lightfoot crabs on christmas island leave their rain forest habitats at the same time
    12·2 answers
  • Which of the following is the largest particle in soil? A-clay B-sand C-silt D-humus
    12·1 answer
  • The earliest hominin that belong to the same genus as modern humans was probably?
    6·1 answer
  • Emic and etic are referred to as
    5·1 answer
  • Helppppppppppppppppppppppppp!!!!?!?!?!?!!!
    11·1 answer
  • Hi again...
    8·2 answers
  • Indicate whether each of the following descriptions is true of microtubules (MT), microfilaments (MF), intermediate filaments (I
    12·1 answer
  • Helppp this is due in 10 minutes!!!! (34 points) How, and why would some continent have more A-Allele than other continents?
    15·2 answers
  • Thrombocytes are essential for coagulation of blood comment
    13·2 answers
  • What precipitation that seeps into the ground and is stored in tiny holes in soil and rocks
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!