How did flowers and fruits contribute to angiosperms becoming dominant land plants on earth?

1 answer:

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Answer: The study, by Dr. Tim Brodribb and Dr. Taylor Field of the University of Tasmania and University of Tennessee, used plant physiology to reveal how flowering plants, including crops, were able to dominate land by evolving more efficient hydraulics, or 'leaf plumbing', to increase rates of photosynthesis.

Explanation: The reason for the success of this evolutionary step is that under relatively low atmospheric C02 conditions, like those existing at present, water transport efficiency and photosynthetic performance are tightly linked. Therefore adaptations that increase water transport will enhance maximum photosynthesis, exerting substantial evolutionary leverage over competing species.

The evolution of dense leaf venation in flowering plants, around 140-100 million years ago, was an event with profound significance for the continued evolution of flowering plants. This step provided a 'cretaceous productivity stimulus package' which reverberated across the biosphere and led to these plants playing the fundamental role in the biological and atmospheric functions of the earth.

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Curare is a poisonous plant extract with a chemical structure like the neurotransmitter ACh. Curare can bind to the ACh receptor

wlad13 [49]

Answer:

i think muscular dysfunction not being able to breath

Explanation:

acetylcholine helps muscular movement so if you are basically paralyze you will die lol

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2 years ago

What is the order of the distinct divisions of the plant kingdom?

wariber [46]

Answer;

Kingdom, Division, Class, Order, Family, Genus and Species

Explanation;

-The plant kingdom is divided into three divisions namely Bryophyta, Pteridophyta and Spermatphyta.

-Division Bryophyta includes mosses and liverworts. Division Pteridophyta includes the ferns and horsetails. They show a greater variety and a greater ability than bryophyte.

-Division Spermatophyta comprises all the seed bearing plants. They are familiar green plants which produce seeds through flowers or cones. The division spermatophyte consists of two main subdivisions: Gymnospermatophyta and Angiospermatophyta, which are the divided into classes and so forth,.

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2 years ago

A nurse informs a woman that there is nothing more that can be done medically for her premature infant who is expected to die. t

allsm [11]

The answer to this question would be: Inhibited grief.

Inhibited grief happens when someone does not display any sign of mourning. This kind of grief can cause a health problem like a stomach ache or a headache. It is important to resolve the grief when losing someone important so that grief doesn't come back as an unexplained medical problem.

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2 years ago

In your own words describe what the geological time scale is.

kozerog [31]

Answer:

Geological time scale is the arrangement of major divisions of geological time into eras, periods and epochs on the time scale.

Consider giving me brainliest

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2 years ago

Which of the following is NOT an accurate description of protein synthesis and folding?

julia-pushkina [17]

Answer:

OPTION b. "The 3D shape of a protein is determined largely by the ribosome forming the protein" is NOT an accurate description of protein synthesis and folding.

Explanation:

a. Many copies of a protein can be synthesized simultaneously from the same mRNA. TRUE. As a ribosome moves along the mRNA chain synthesizing a new protein, another ribosome might follow it, synthesizing another protein from the same mRNA chain. And so on. So, at the same time, many ribosomes might be attached to the mRNA, synthesizing many copies of the protein, but at different development levels. The mRNA chain together with many ribosomes is called a polyribosome.

b. The 3D shape of a protein is determined largely by the ribosome forming the protein. FALSE. What determined the 3D structure of the protein is the amino acid sequence of that particular polypeptide. Each amino-acid has different properties (hydrophobic, hydrophilic, positively charged, negatively charged) and they interact with each other by different bonds that depend on those poperties. So the amino acids composing the proteins and their interaction, is what models the structure of the protein.

c. The entire chain of amino acid exits the ribosome before it begins folding into its 3D shape. TRUE. When the ribosome reaches the end codon, the elongation process has finished, and the new protein leaves the ribosome and is translocated to the RER lumen where it is going to get folded.

d. The first encoded amino acid in every protein is methionine. TRUE. Almost always, the first amino acid located by the tRNA is the methionine, codified by the initiation codon AUG. This amino acid is frequently eliminated at the end of the process.

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3 years ago