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Alexxandr [17]
2 years ago
12

Through the course of evolution, plants have developed smaller gametophytes and larger sporophytes. Study the list of plants. Th

en, place them in order, from the one with the briefest gametophyte stage to the one with the longest gametophyte stage.
green algae
ferns
mosses
seed plants
Biology
1 answer:
Lapatulllka [165]2 years ago
7 0

Ans.

Gametophyte shows haploid, gamete-forming stage of plant's life cycle, while sporophyte shows diploid, spore-forming stage of plant's life cycle. In green algae, gametophytes and sporophytes are isomorphic (indistinguishable). In bryophytes, such as mosses, gametophyte shows dominant stage as it is most visible stage in their life-cycle. In vascular plants, such as ferns and seed plants, sporophytes show dominant stage.  

Thus, 'seed plants show briefest gametophyte stage' and 'mosses show longest gametophyte stage.'

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D. Chemical bonds in food molecules are broken, releasing energy and allowing cells to use the energy to make ATP.

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Yes...This is an example of speciation by natural selection

Explanation:

As we know that natural selection always promote those evolutionary changes that are necessary. Changes that happen in chromosome number always promote with a specie that is closely related to the parent specie and produce fertile off-springs. These new generations are most adaptable and can survive in the environment more efficiently than the previous ones.

Additionally, other than natural selection, speciation can also happen as a result of random mutations, genetic drift and by means of artificial selection as well. But the natural likelihood of all these is probably low as compared to that of natural selection.

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2 years ago
When early systematists distinguished Chondrichthyes (cartilaginous fish) from Osteichthyes (bony fish), it was not clear exactl
SashulF [63]

Answer:

The correct answer is option C.

Explanation:

The Chondrichthyes is a class that comprises the cartilaginous fishes such as batoids, ratfish, sharks and others, The Chondrichthyes and the Osteichthyes also known as bony fish were distinguished in early classification but it was not clear at that time when bony skeletons appeared in the vertebrates.

Traces of bone tissues that are found in fossil and living Chondrichthyes are suggested that these cartilaginous fishes derived after the origin of the bony skeleton in vertebrates.

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2 years ago
The bridge in the picture is connecting two pieces of land that represents two distinct places. What type of boundary is this?
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The correct answer is physical boundary.

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Answer:

The correct genotypic notation for a wild type with phenotypic characteristics: red eyes, long bristle and round eyes will be any of CNRDll, CnRdl, CnRDl or CNRdl if c, n, r and d are capable of independent assortment and CNRDl if they cannot.

Explanation:

The eye color and bristle size is coordinated by either recessive cn and dominant CN or Cn genes. The wild type in questions has red color eyes, which is a dominant trait coordinated by CN or Cn if c and n can undergo assortment independently or just CN if they cannot. The second characteristics of the wild type is long bristle. We were told that reduced bristle is coordinated by recessive rd Gene. Then the long bristle in our specimen wild type will have dominant genotypic notification of RD or Rd, depending if r and d can undergo assortment independently. The last trait is a round eyes, which is a recessive trait controlled by recessive allele l. Therefore, the combined characteristics of red eye color, long bristle and round eyes shape of the wild type will be CNRDl or any of CNRDll, CnRdl, CnRDl CNRdl depending on the segregation pattern of c, n, r and d.

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