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djverab [1.8K]
3 years ago
15

Why are orcas having trouble reproducing?

Biology
2 answers:
morpeh [17]3 years ago
7 0

Orcas primarily suffer from the effects of pollution, habitat loss, dams that block salmon spawning routes and starvation from declining populations of wild salmon, their main food source.

daser333 [38]3 years ago
6 0

Answer:

they start breeding at the ages 14-15, give birth to only 1 calf at a time every 3-10 years, the babies nurse for a full year, and almost half of all babies die within the first year :/

Explanation:

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Evgen [1.6K]
A multicellular organism develops from a single cell.
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2 years ago
A maize plant with genotype Aa Bb produces the following gametes 100 Ab 45 AB 106 aB 50 ab This tells us that the two genes are
bogdanovich [222]

Answer:

True

Explanation:

The linkage relation of two genes can be determined on the basis of calculating recombination frequency.

If the recombination frequency value is greater than 50% then the genes are not linked and if the value is less than 50% then the genes are linked.

In the given question, the  crossover gametes formed will be Ab = 100

and aB= 106.

Therefore,

\dfrac{recombinant\ progenies}{ Total\ progeny}\times 100\\\\\dfrac{100 +106}{100+106+45+50}\times 100\\\\=\dfrac{206}{301}\times 100\\\\= 68.43\%

Since the recombinant frequency value is larger than 50% therefore the genes do not show linkage.

Thus, True is the correct answer.

7 0
3 years ago
Please help me this is science
-BARSIC- [3]

Answer:

Orgams

Explanation:

Organs

8 0
3 years ago
Organisms that live in the rainforest have developed unique adaptations that aid in their survival. Which adaptation would most
Dafna11 [192]
The correct answer is letter a. herbivores feed on low-lying plants. Organisms that live in the rainforest have developed unique adaptations that aid in their survival just like <span>herbivores feed on low-lying.</span>

Here are the choices

<span>a. herbivores feed on low-lying plants
b. birds have beaks adapted to break open hard shells
c. insects have a widely-varied diet
d. plants are able to store water in their leaves</span>
6 0
3 years ago
Read 2 more answers
​with the sequence of the gene-coding regions of the human genome in hand and the development of newer sequencing methods, scien
Masteriza [31]

With the sequence of the gene-coding regions of the human genome in hand and the development of newer sequencing methods, scientists are able to

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5. understand the inheritance of genes especially the rare mutations in a population.

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3 years ago
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