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creativ13 [48]
3 years ago
6

blue jays and robins do not interbreed. assuming that blue jays and robins share the same habitat, describe the possible conditi

ons that keep these bird reproductively isolated. explain your answer.
Biology
1 answer:
Dvinal [7]3 years ago
5 0
Since the two species co-inhabit the same habitat, habitat isolation can be disregarded as a factor keeping the two species separate. There are however some other broad categories of mechanisms for <span>reproductive isolation. One is behaviour. Many birds in particular have very specific mating rituals, including mating dances, particular bird song, the development of specific mating plumage, the release of specific pheromones and the building of a particular nest structure. Another broad category is mechanical isolation. You will find that the genital organs of particular species are very specific, and preclude other close species from successfully mating. Another broad category is gametic isolation. For most species combinations, it is not possible for the gametes to fuse successfully to form a hybrid. If hybrid games do fuse, in many cases, the hybrids are sterile, such as mules for example.     </span>
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In which element and a fragmented landscape would you expect to find the largest number of species
k0ka [10]

Answer:

A corridor that is attached or connected to a large patch.

Explanation:

Corridors in biology can either be within an aquatic or terrestrial environment. The movement of animals is mostly between these two corridors, or corridors within the main ones. Because corridors are very long and continuous strips of land or water with much vegetation or reefs, there are numerous amounts of species. These corridors are meant to aid movement of animals, so it is only natural that there would be a large amount of them at the end of a corridor.

5 0
3 years ago
Read 2 more answers
A. circle the portion of the molecule in model 1 that is polar.
xxMikexx [17]
Attached is Model 1. I found the exercise on the internet.

A. The portion of the molecule that's polar is the head of the molecule - phosphorus containing group plus the glycerol backbone.
The other part of the molecule has two fatty acid chains which are hydrophobic meaning that they are nonpolar.

B. Yes, it would mix well with water because polar molecules are dissolved in water perfectly. Their partly positive portion and their negative polar connect to the positive charge of the H atoms and negative charge of the O atom of the water molecules.

6 0
3 years ago
Which of the following is not part of the nucleotide structure?
loris [4]

Answer:

Which of the following is not part of the nucleotide structure?

a.

<h2>Sulfate backbone </h2>

c.

Phosphate group

b.

Nitrogenous base

d.

5-carbon sugar

Explanation:

A nucleotide is an organic molecule that is the building block of DNA and RNA. ... A nucleotide is made up of three parts: a phosphate group, a 5-carbon sugar, and a nitrogenous base. The four nitrogenous bases in DNA are adenine, cytosine, guanine, and thymine. RNA contains uracil, instead of thymine.

6 0
3 years ago
Birth rate = 35
serg [7]
Population decreases by 15.

Birth rate means more population (positive), death rate means less population (negative), immigration means more (positive), and emigration means less (negative).  So, just add and subtract the appropriate numbers:

35\ people\ born-7\ people\ die+4\ people\ enter-17\ people\ leave=\\-15\ people

Negative 15 people means that the population decreases by 15.
6 0
3 years ago
Someone, please help!
Andrej [43]

Answer:

Step 2: The right ventricle pumps the oxygen poor blood to the lungs via pulmonary valve. Step 3: The left atrium receives oxygen -rich blood and pumps it to the left ventricle. Step 4: The left ventricle pumps the oxygen-rich blood via aortic valve, submitting this blood through the entire body.

Explanation:

Use this website if you need more information. Good luck.

https://wa.kaiserpermanente.org/kbase/topic.jhtml?docId=tx4097abc

4 0
3 years ago
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