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
lions [1.4K]
3 years ago
11

What percentage of North American frogs and toads are in trouble?

Biology
2 answers:
photoshop1234 [79]3 years ago
8 0
Research suggests that even though amphibians are severely declining worldwide, there is no smoking gun – and thus no simple solution – to halting or reversing these declines.

Though every region in the United States has suffered amphibian declines, threats differ among regions. They include:

Human influence from the Mississippi River east, including the metropolitan areas of the Northeast and the agricultural-dominated landscapes of the Midwest
Disease, particularly a chytrid fungus in the Upper Midwest and New England
Pesticide applications east of the Colorado River
Climate changes across the Southern U.S. and the West Coast
Amphibian declines are a global phenomenon that has continued unabated in the United States since at least the 1960's. Declines are occurring even in protected national parks and refuges.

The average decline in overall amphibian populations is 3.79 percent per year, though the decline rate is more severe in some regions of the U.S., such as the West Coast and the Rocky Mountains. If this rate remains unchanged, some species will disappear from half of the habitats they occupy in about 20 years.

Amphibians are good indicators of significant environmental changes. Amphibians, unlike people, breathe at least partly through their skin, which is constantly exposed to everything in their environment. Consequently, their bodies are much more sensitive to environmental factors such as disease, pollution, toxic chemicals, ultraviolet radiation, and habitat destruction. The worldwide occurrences of amphibian declines and deformities could be an early warning that some of our ecosystems, even seemingly pristine ones, are seriously out of balance.
12345 [234]3 years ago
3 0

Answer:

The decline rate ranges from 2.7 to 3.79

You might be interested in
Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species. M
padilas [110]

Answer:

Embryology: the study of similarities in embryos of organisms to find common connections

Developmental biology:  the study of life cycles of organisms to find common

Molecular biology: the analysis and comparison of DNA to better understand relationships between species

comparative anatomy: the study of the anatomy of an organism to explain evolutionary similarity

Explanation:

Embryology can be described as the branch of biology in  which studies about the sex cells, the process of fertilization and the development of the fetus or embryo are made. The similarities between the embryos show evolutionary history among different organisms.

Developmental biology can be described as the branch of biology in which studies are made about the processes of growth and developmental procedures about organisms. Organisms belonging to different groups can also show developmental similarities if they have a common ancestor.

Molecular biology is the branch of biology which is related to the study of life on molecular level. At this level, similarities between the genome of organisms can be checked for evolutionary histories.

Comparative anatomy: It is the branch of biology in which organisms are studies based on the similarities and differences in their structures.

5 0
3 years ago
I need help...................
Cerrena [4.2K]
The answer is polarity
3 0
3 years ago
What is the platform of ADNOC called?<br> (Please dont comment files)
SVETLANKA909090 [29]

Answer: ADNOC Hosts Youth Circle at its Umm Lulu Offshore Platform as it Focuses on the Future - Abu Dhabi National Oil Company.

Explanation: Hope that was helpful! :D

7 0
2 years ago
About how much energy is transferred from a primary consumer to a sencondary consumer
stepladder [879]

c. 10% primary energy

5 0
3 years ago
Read 2 more answers
What is a flagship species?
Blizzard [7]

Answer:

In conservation biology, a flagship species is a species chosen to raise support for biodiversity conservation in a given place or social context.

Explanation:

I just know ig ...

4 0
2 years ago
Read 2 more answers
Other questions:
  • It is 10 a.m. and Julie is trying to decide what to prepare for tonight's dinner. She selects a frozen turkey breast and must th
    13·1 answer
  • After Caroline scrapes her knee, the _____ cells that surround the wound begin to rapidly_____ to replace the lost cells.
    6·2 answers
  • Sperm cells are found inside pollen. What kind of cells are sperm?
    5·1 answer
  • Hummingbirds drink nectar from flowers. Your teacher has asked you to make a model of a flower that would attract a numu.
    9·1 answer
  • The female with this karyotype would have which genetic disorder? A. Klinefelter's syndrome B. Turner's syndrome C. trisomy-21 D
    11·1 answer
  • Where does the majority of protein digestion take place?
    9·1 answer
  • What are acellular organisms​
    10·2 answers
  • Define gamete and zygote. What number of chromosomes does each have?
    11·1 answer
  • Does anyone know what the answer is
    5·1 answer
  • Determine whether carbohydrate loading is beneficial or not beneficial for each of the activities listed.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!