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Minchanka [31]
3 years ago
12

Geographically, where do you think marsupials originally came from​

Biology
1 answer:
yarga [219]3 years ago
8 0
I do believe Marsupials originally came from South America but was once thought to originate from Australia.
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Which is a biological effect of the hydrogen bonding between molecules of water
vaieri [72.5K]

Living things can survive in the water beneath a lake's frozen surface/

Hope this helps!


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6 0
3 years ago
Which option identifies ways that people positively affect Earths resources
matrenka [14]

Answer:

Halting the use of resources is impractical. Increasing the mining efforts would lead to further depletion of resources. Hence, the correct options are: build dams, use cars that emit fewer harmful gases, and halt the runoff of factory waste into rivers and streams which would positively affect Earth's resources.

Explanation:

6 0
3 years ago
If the frequency of the recessive allele for a gene is 0.3, calculate the expected frequency of heterozygotes in the next genera
Kisachek [45]
Q = recessive allele frequency = 0.3, and thus in H-W equilibrium there are ONLY two alleles, q (recessive) and
p (dominant). Therefore all of the p and q present for this gene in a population must account for 100% of this gene's alleles. And 100% = 1.00.
So p, the dominant allele frequency, must be equal to 1 - q --> p = 1 - q
p = 1 - 0.3 = 0.7.
Since heterozygotes are a combination of the p and q, we must again look at the frequencies of each genotype: p + q = 1, then (p+q)^2 = 1^2
So multiplying out (p+q)(p+q) = 1, we get: p^2+2pq+q^2 = 1 (all genotypes), where p^2 = frequency of homozygous dominant individuals, 2pq = frequency of heterozygous individuals, and q^2 = frequency of homozygous recessive individuals.
Therefore if the population is in H-W equilibrium, then the expected frequency of heterozygous individuals = 2pq = 2(0.7)(0.3)
2pq = 2(0.21) = 0.42, or 42% of the population.
Hope that helps you to understand how to solve population genetics problems!
7 0
3 years ago
Please help .. urgent
fenix001 [56]

Answer:

C

Explanation:

they both go through incomplete metamorphosis so they will both develop as a nymph

6 0
2 years ago
Read 2 more answers
A particular bird species found in North America obtains most of its food energy by catching and eating insects. A mutation aris
patriot [66]
The answer is D. Individual birds with the mutation will be more likely to survive than birds without the mutation
5 0
2 years ago
Read 2 more answers
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