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-BARSIC- [3]
3 years ago
12

In pea plants, purple flowers are dominant to white flowers. Suppose two heterozygous purple-flowered plants (Tt) are crossed. W

hat percentage of offspring will also have purple flowers?
Biology
1 answer:
iris [78.8K]3 years ago
4 0

Answer:

75%

Explanation:

This question involves a single gene coding for flower color in pea plants. The allele for purple flowers (T) is dominant over the allele for white flowers (t).

According to the question, two heterozygous purple-flowered plants (Tt) are crossed i.e. Tt × Tt. The following gametes will be produced by each parent; T and t. Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:

TT, Tt, Tt, and tt.  

Since purple allele (T) is dominant, offsprings TT, Tt, and Tt will be phenotypically purple-flowered. Hence, ¾ × 100 = 75% of offsprings will have purple flowers.

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With reference to the diagrams below, describe how fishes and bottom dwelling polychaete worms cope with the fluctuating salinit
klasskru [66]

Fishes and bottom dwelling worms cope with the fluctuating salinity within estuaries over the tidal cycle with the use of transport system such as active and passive transport.

<h3>How active and passive transport system are used?</h3>

In salty water, fish and other marine organisms used active transport in which energy is used to remove salts from the body of these marine organisms because excess salts are harmful for them.

So we can conclude that Fishes use transport system such as active and passive transport to cope with the fluctuation of salt concentration.

Learn more about salinity here: brainly.com/question/20283396

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6 0
2 years ago
Consequences of human interaction with the natural environment
pochemuha

Answer:

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.

Explanation:

So, What Happens if Pollution Continues to Increase? ... Breathing air pollution hampers the functioning of lungs among healthy people resulting in respiratory inflammation and heart problems. Living in a polluted area and breathing toxic air increases the risk of cancer. Air pollution weakens the immune system

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Explain how volcanic activity, run-off and dissolved gases affect the chemical composition of seawater
Angelina_Jolie [31]

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Seawater is a complex mixture of 96.5 percent water, 2.5 percent salts, and smaller amounts of other substances, including dissolved inorganic and organic materials, particulates, and a few atmospheric gases, so it would affect the water negatively.

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3 years ago
I'll give 100 points &amp; a brainliest for whom ever can answer these properly. This is for a grade 11 semester research paper
anygoal [31]

I kept a record of the sources with the extracted information. I have the links if you would like them.

<u>Hydro-international article: Benthos, Inc.</u>

Benthos was founded by Samuel O. Raymond.  

He created an innovative company in marine technology which has positively impacted the field for over four decades.

It manufactures a variety of oceanographic equipment, including flotation devices; hydrophones for locating mining sites, tracking boats, and research for marine biology; and modems, which are used to communicate information wirelessly underwater.

For much of the company's lifetime, it supplied underwater equipment to the military, the government, and for research.

<u>Smithsonian Magazine: 14 fun facts about marine bristle worms</u>

Polychaete worms are a diverse class of animals with at least 10,000 species.  

They are characterized by a head and a tail, and a pair of bristled "legs", called parapodia, for each segment of their body. They are typically bioluminescent, meaning they have the natural ability to glow.

Due to their effective adaptation, they can live in any marine habitat (including coral reefs, hydrothermal vents, or simply out in the open ocean) and have survived the five mass extinctions since 500 million years ago.

<u>National Ocean Service: What is a bivalve mollusk?</u>

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Their organ, the mantle, produces calcium carbonate which causes the shell to grow with the organism.

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They were given this name for their ability to contract and squirt water.  

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They live in subtidal locations while attached to shells, rocks, piers and boat hulls.

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<u>Conclusions or Summary:</u>

The marine technology company Benthos led to the discovery or further information about these animals because it provided equipment to researchers.

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3 years ago
What structures solve the end replication problem for linear chromosomes?
omeli [17]

Answer:

Eukaryotes have solved the end-replication problem by locating highly repeated DNA sequence at the end, or telomeres, of each linear chromosome.

Explanation:

Telomeres are stretches of DNA at the ends of the chromosome, They protect the genetic data and make it possible for cells to divide.

3 0
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