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nirvana33 [79]
3 years ago
5

Which of the following types of reproductive barriers separates two species of sea cucumbers, whose sperm and eggs often bump in

to each other but do not cross-fertilize because of incompatible proteins on their surfaces?1 habitat isolation2 gametic isolation3 mechanical isolation4 temporal isolation
Biology
1 answer:
Effectus [21]3 years ago
8 0

Answer:

2 gametic isolation

Explanation:

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biologists is studying two species of lizards in a mountainous region. The two species are separated by habitat with one species
ivann1987 [24]

Answer:

Valley lizard = Oviparous

Mountain lizard = Viviparous

Explanation:

In Darwin's theory survival of the fittest, he believed species adapt or change within their environment. So I believe lizards living in a valley would be more safe to lay their eggs but lizards living in the mountains would be viviparous because of the non-predicted and unsafe environment which could harm the better chances of development of the offspring.

5 0
3 years ago
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What notes information about the users who access a computer network?
Elina [12.6K]

Answer: A. Log file

Explanation:

a file that records either events that occur in an operating system

3 0
3 years ago
What does a hydrogen atom need to be in for hydrogen bonding to occur?
Gnoma [55]

Answer:

Hydrogen Bonding. A hydrogen bond is a weak type of force that forms a special type of dipole-dipole attraction which occurs when a hydrogen atom bonded to a strongly electronegative atom exists in the vicinity of another electronegative atom with a lone pair of electrons

Explanation:

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3 years ago
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Why is water considered a renewable resource? answers?
Marianna [84]
Water is considered a renewable resource because the Earth does provide it by itself. Therefore it’s renewable.

Hope I could help! :)
4 0
3 years ago
If an atom has 15 electrons, how many electrons are in the n=1 energy level?
IRISSAK [1]

Answer:

In the n=1 energy level, the atom has 2 electrons

Explanation:

Electrons orbit the nucleus of an atom in multiple rings (energy levels). The first ring of the electron can only hold 2 electrons. After that, electrons are added to the second ring. Excluding the first ring, all other rings can hold a maximum of 8 electrons.

For example, Oxygen is an atom with 6 electrons. The first energy level contains 2 electrons, and the second energy level contains 4 electrons. The second energy level has room for up to 4 more electrons.

In your example of an atom with 15 electrons, there would be 2 electrons in the first ring, 8 electrons in the second ring, and 5 electrons in the third and final ring.

To summarize, all atoms have a first energy level containing 2 electrons, and all other energy levels can contain 8 electrons. This is true no matter the number of electrons.

7 0
2 years ago
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