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ale4655 [162]
3 years ago
14

When were the two major extinction periods that amphibians have survived?

Biology
1 answer:
faltersainse [42]3 years ago
8 0

in the 1950s and in 2007

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25.
laila [671]
The answer would be C as it can be directly tested experimentally and observed that bacteria adapted to become drug resistant and the natural selection of drug resistant bacteria to survive and continue proliferating, thus being direct evidence of evolution
4 0
3 years ago
Which of the following happens because of mitosis? (Check all that apply)
Nataly [62]

Answer:

1,2

Explanation:

During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. ... Then, at a critical point during interphase (called the S phase), the cell duplicates its chromosomes and ensures its systems are ready for cell division.

6 0
3 years ago
A marine ecologist counts the number of crabs in three different intertidal regions that are each two hectares. The crab counts
romanna [79]

Answer:

Density is nearly 3 cabs per hectare

Explanation:

Given -

There are three three intertidal regions.

Area of each intertidal region is 2 hectares.

Number of crab in the intertidal regions are as follows -

Intertidal region I - 7

Intertidal region I - 2

Intertidal region I - 6

Sum of crabs in all three regions is equal to

7 + 2+ 6\\= 15

Total area of all three intertidal regions is equal to

2 + 2+ 2\\= 6 hectares

Now density per hectare is equal to total population of crab divided by total area of all the three intertidal regions

Density = \frac{15}{6} \\= 2.5

Density is nearly 3 cabs per hectare

5 0
2 years ago
The inheritance pattern for an autosomal dominant trait is shown in the pedigree Shaded symbols represent individuals that expre
True [87]

Answer:the answer is c

Explanation:

And for biology to find answers download quizzes or socratic it helps you find the answers for problems like this fyi♥︎

3 0
2 years ago
Will mark brainalist!!
fenix001 [56]

Answer:

1 is a phenotype

2 is a genotype

p reps the given allele of one parent

6 0
3 years ago
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