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makvit [3.9K]
3 years ago
10

PLS HELP!

Biology
1 answer:
KatRina [158]3 years ago
8 0

Answer:

D. One is polar, and one is nonpolar

Explanation:

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What species concepts is not very useful in defining plant species because some plant groups readily hybridize with other plant
matrenka [14]

Answer:

The <u>biological species concept</u> is not very useful in defining plant species.

Explanation:

The biological species concept says that <em>species are population groups that, in a real or potential way, can reproduce and that </em><em>are reproductively isolated from other groups.</em>

<em>Individuals belonging to a species cannot reproduce with members of other species. </em>

This biological concept has limitations. Its application might present difficulties in concern with asexual reproduction species, such as bacteria, rotifer, cnidarians, plants, and etcetera.

Besides, this concept cannot be applied to the past because it is difficult to deduce reproductive capability between extinct species.

Finally, this concept is not adequate in concern to hybridization zones, something to be expected considering evolutionary processes. This is why this concept has been less accepted by botanists, as some plant species hybridize with other species. For example, species Quercus grisea and Quercus gambelii have overlapping ranges in the southwestern United States. Hybrids showing variation in leaf shape and other traits have been found in many places in this area.

3 0
3 years ago
Segmented animals are ____ symmetrical. Their bodies are divided into repeating parts, or segments. Typically, some of their bod
tatuchka [14]
<span>bilateral this is the answer</span>
6 0
3 years ago
Read 2 more answers
What is number 2 &amp; 3 ?
lesya [120]

Answer:

Two and three are the only two consecutive prime numbers. 2 is the first Sophie Germain prime, the first factorial prime, the first Lucas prime, and the first Ramanujan prime. Two is the third (or fourth) Fibonacci number .

Cardinal: two

Factorization: prime

Numeral system: binary

Explanation:

Hope this helps

5 0
2 years ago
An atom that has 19 protons, 21 neutrons, and 18 electrons has a mass of ____? *
Paul [167]

Answer:

19 - Potassium - K.

Explanation:

3 0
2 years ago
Which type of cell is responsible for causing apoptosis in cancer cells and virus-infected cells?
lbvjy [14]
The answer is natural killer cells.

Natural killer cells are a type of lymphocytes and they are important for the innate immune system. They recognise stressed cells much faster than other immune cells. Their response is rapid and usually only a few days after a viral infection. They also respond to <span>cancer cell </span>formation. While other immune cells can detect only those harmful cells that have specific markers on the surface of the cell membrane, natural killer cells can even detect those cells that miss markers for apoptosis.
6 0
3 years ago
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