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aniked [119]
4 years ago
15

In a fern, the prothallus is the gametophyte true or false

Biology
2 answers:
spin [16.1K]4 years ago
6 0

Answer:

The correct answer is option True.

Explanation:

Ferns are the seedless tracheophytes belonging to group pteridophytes of the plant kingdom. The life cycle of a fern is divided into two phases: the haploid gametophytic stage and diploid sporophytic stage.  

The gametophyte is formed from the sporophytic spores after they are germinated on a suitable substratum. Sporophyte after germination forms a bisexual heart-shaped structure with no vascular tissues so uses rhizoids for attachment. This formed gametophyte is known as "prothallus".

Thus, the gametophyte structure is known as prothallus is true.

frosja888 [35]4 years ago
3 0
A prothallium, or prothallus<span> is usually the </span>gametophyte<span> stage in the life of a </span>fern<span> or other pteridophyte. Occasionally the term is also used to describe the young </span>gametophyte<span> of a liverwort or peat moss as well.</span>
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Use the complementary rule: If we had a DNA strand of 20 nucleotides, and 6 of them
polet [3.4K]

Answer:

6 thymine, 4 guanine. 4 cytosine

Explanation:

Adenine pairs with thymine, so you need 6 of each

Cytosine matches with guanine, but the total of nucleotides is 20, so

6(adenine)+6(thymine)=12

20-12=8

8= 4(guanine)+4(cytosine)

8 0
3 years ago
Pigmented eyes (P) are dominant to non-pigmented (p), and dimpled chins (D) are dominant to Non-dimpled chins (d). A pigment-eye
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Answer:

PpDD and PpDd

Explanation:

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The genotype of a blue-eyed, dimpled chin child would be either of ppDd or ppDD, but in this case, the mother is ppdd and as such, the child cannot have two copies of D allele. Hence, the genotype of the child can only be ppDd.

In order for the child to have blue eyes (pp), it means that the father has to have the non-pigmented allele (p). This also means that the father is heterozygous for eye pigmentation (Pp).

<em>Hence, the genotype of the father is now limited to </em><em>PpDD</em> <em>and </em><em>PpDd</em>.

8 0
3 years ago
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dexar [7]

Answer:

<h2>A. precipitation</h2>

Explanation:

because the after  evaporation and condensation

it rains which is precipitation

6 0
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