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3 years ago

The uniqueness of individual offspring for many animals and plants is the result of a process called _____. mitosis meiosis

2 answers:

8 0

The uniqueness of individual offspring for many animals and plants is the result of a process called Meiosis.

During meiosis , the number of chromosomes in parent cell are reduced by half and produces four gamete cells.

Later on, these chromosomes are mixed into the new offspring, causing it carried out some characteristic from its parents and became a new unique individual.

DIA [1.3K]3 years ago

5 0

The answer is meiosis.

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What are the factors that contributed to the success of pteridophyte as land plant

Anna35 [415]

Two factors contributed to the success of the pteridophytes: the extreme miniaturization of the gametophytic generation and an important development of the sporophytic generation (development of the tree forms).

Pteridophytes are a group of plants that peaked in the Carboniferous (-300 million years). It is the first great terrestrial plant civilization. These plants would have appeared in the Devonian -400 million years ago, perhaps from certain primitive terrestrial plants which, unlike bryophytes, would have favored the diploid generation on the haploid generation.

Particularly well adapted to terrestrial life, they have created, thanks to the development of tree forms, immense forests whose fossilization is at the origin of coal deposits.

Pteridophytes are at the origin of an evolutionary lineage based on the extreme miniaturization of gametophytic generation and an important development of sporophytic generation, leading to all tracheophytes including current flowering plants. Pteridophytes are well adapted to terrestrial life, however fertilization still requires the presence of water since male gametes are swimmers.

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3 years ago

Although controversial at first, the germ theory of disease proposed that microorganisms were the cause of many diseases. Which

Iteru [2.4K]

Mainly colds and flus.

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3 years ago

compare the reproductive strategies of a short lived species such as a starfish and a long lived species such as a hippopotamus

AVprozaik [17]

Answer:

Starfish reproduce every winter by ejecting there eggs into the water, since they only live on average 35 years they reproduce about 35 times in their lifetime. Only a couple of the eggs will fertilize and turn into a Starfish.

Hippos are the only mammals in Africa that reproduce in water, Hippos reproduce in May and through June. Hippos usually live to around 40 to 50 years, and most hippos through May and June reproduce more than one time.

Explanation:

Hippos strategies of reproducing are better than Starfish.

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3 years ago

Cual es la comparación de la sinapsis química y eléctrica?

ipn [44]

En las sinapsis eléctricas la información se transmite a través de corrientes locales, mientras que en las sinapsis químicas se transmite mediante neurotransmisores. ... Las sinapsis eléctricas son simétricas, mientras que las químicas son asimétricas.

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3 years ago

Read 2 more answers

A recent study of the marine hawksbill turtle's stomach contents revealed that sponges constitute a major portion of their diet.

bearhunter [10]

Answer:

These structures that protect the sponges from most predators, but not turtles, are spicules.

Explanation:

Sponges skeleton is composed of calcium carbonate and siliceous micro-structures called spicules. Their morphology is so varied that it is used in taxonomy for identification and classification.

There are different kinds of spicules:

- Monoaxonic spicule: needle-shaped, straights or curves

- Tetraxonic spicules: they have four prolongations

- Triaxonic or Hexaxonic spicules

- Poliaxonic spicules

Two terms can be applied to any of these spicules kinds:

- Megaspicules: They are elongated and compose the main architecture of the sponge skeleton

- Microspicules: Variable in shape and size, with ancillary functions

Sponges have few predators thank to the spicule structures and their high toxicity. Many of them are capable of perforating soft tissues and producing urticant substances.

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3 years ago