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sdas [7]
3 years ago
12

What is the role of pollen tube in spermopsida

Biology
2 answers:
Anton [14]3 years ago
6 0
Pollen tube formation is important for sexual reproduction to occur in seed plants. Pollen tubes act as conduits to transport the male gamete cells from the pollen grain either from the stigma (in flowering plants) to the ovules at the base of the pistil or directly through ovule tissue in some gymnosperms.
kherson [118]3 years ago
3 0
This will explain, I hope it helps

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The portion of the tubule system that is relatively impermeable to solutes but contains many aquaporins for water reabsorption
topjm [15]

Descending limb of loop of Henle

It helps to maintain the concentration of urine. It is highly permeable to water thus water is readily reabsorbed from the descending limb by osmosis. It is impermeable to sodium and chloride ions.

<h3>What is a Tubule system ?</h3>

The transverse tubular system is a network of interconnecting rings, each of which surrounds a myofibril

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3 0
2 years ago
What process forms egg cells
Gala2k [10]

Explanation:

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4 0
3 years ago
The respiratory membrane consists of
ANEK [815]
It consists of the alveolar wall, the capillary wall, and their basement membranes.
8 0
3 years ago
This model shows the basic process of making a protein. What are the strengths and limitations of this model?
Len [333]

Answer:

Results

We systematically analyze and compare how different modelling methodologies can be used to describe translation. We define various statistically equivalent codon-based simulation algorithms and analyze the importance of the update rule in determining the steady state, an aspect often neglected. Then a novel probabilistic Boolean network (PBN) model is proposed for modelling translation, which enjoys an exact numerical solution. This solution matches those of numerical simulation from other methods and acts as a complementary tool to analytical approximations and simulations. The advantages and limitations of various codon-based models are compared, and illustrated by examples with real biological complexities such as slow codons, premature termination and feedback regulation. Our studies reveal that while different models gives broadly similiar trends in many cases, important differences also arise and can be clearly seen, in the dependence of the translation rate on different parameters. Furthermore, the update rule affects the steady state solution.

Conclusions

The codon-based models are based on different levels of abstraction. Our analysis suggests that a multiple model approach to understanding translation allows one to ascertain which aspects of the conclusions are robust with respect to the choice of modelling methodology, and when (and why) important differences may arise. This approach also allows for an optimal use of analysis tools, which is especially important when additional complexities or regulatory mechanisms are included. This approach can provide a robust platform for dissecting translation, and results in an improved predictive framework for applications in systems and synthetic biology.

hope it help friends

3 0
3 years ago
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NikAS [45]

D) Yes, the need to conserve copper must be balanced with use.

3 0
3 years ago
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