BIOLOGY HIGH SCHOOL

A plant's photoperiod is the amount of time each day that the plant receives sunlight. A plant with a 12L:12D photoperiod receives 12 hours of light and 12 hours of dark per day. A researcher investigated whether photoperiod affects the development of flower buds in chrysanthemums, a type of flowering plant. She maintained three samples of chrysanthemums that did not initially have any flower buds under different photoperiods. After two weeks, the researcher recorded the presence or absence of flower buds in each sample. The researcher's results are shown in the table. Sample Photoperiod Results 1 13L:11D fully developed flower buds formed on all plants 2 14L:10D partly developed flower buds formed on some plants 3 15L:9D no buds formed on any plant Which statement is best supported by the researcher's findings?

Answers

Answer 1
Answer:

Answer:

13L:11D

Explanation:

Based on the photoperiod there are two types of plants -  

a) Short day plant  

b) Long day plant

Here the term short and long day do not mean that the provided length of day are the critical length of day required for reproduction. But opposite to that it means that the length of the day required for reproduction must be  

a) Shorter than the defined length of day for short day plant  

b) And longer than the defined length of day for long day plant  

Chrysanthemums  is a short day plant and thus option 1 with 13L:11D will produce fully developed flower buds

Option A is correct 13L:11D
Answer 2
Answer:

Final answer:

The researcher's findings illustrate that photoperiod greatly affects the development of chrysanthemum buds, with longer periods of light exposure reducing bud formation. The mechanism behind this is likely due to photoperiodism, a biological response that allows plants to regulate their growth based on day length.

Explanation:

The researcher's findings suggest that the photoperiod, or duration of light exposure, significantly impacts the development of flower buds in chrysanthemums. In the experiment, chrysanthemums with a 13L:11D photoperiod produced fully developed flower buds. In contrast, the plants with a 14L:10D photoperiod produced only partly developed buds and those with a 15L:9D photoperiod did not develop any buds. It is evident from these results that there is a decrease in bud formation with an increase in light hours. Chrysanthemums, therefore, seem to need a specific balance of light and darkness for optimal flower bud development.

The mechanism behind this is likely related to photoperiodism, a biological response to the timing and duration of day and night that controls flowering and other growth in plants. Plants use the phytochrome system to sense changes in day length, which is an essential indicator of season. This system allows them to regulate their physiological activities, such as flowering, accordingly. So, the results of this study underline the importance of photoperiodism in flowering plants.

Learn more about Photoperiodism here:

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your doing biology ?

When skeletal muscle cells undergo anaerobic respiration, they become fatigued and painful. This is now known to be caused by A) buildup of pyruvate.
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E) increase in ethanol.

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When skeletal muscle cells undergo anaerobic respiration, they become fatigued and painful. This is now known to be caused by buildup of lactate. 

Which process plays an important role in the biogeochemical cycles of carbon, nitrogen, and phosphorus?

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The biogeochemical cycles move through mainly the biotic and abiotic components of the earth, more elaborately the spheres -biospheres, lithosphere, hydrosphere and atmosphere regions of the ecosystem. These biogeochemical cycles, from its terminology and discernable word morphology- involves the biological, geological and chemical components that make out to complete an exact and purposed cycle. The purpose in these cycles are to maintain balance and to ensure the ongoing process of the living and non-living organisms in the environment. These cycles’ help to living organisms survive and thrive. One popular example is the water cycle. 

Which of the following best explains why deforestation increases the risk of floods in an area?a. Tree leaves catch and retain rain water.b. Trees block the free flow of water.c. Deforestation increases precipitation.d. Tree roots improve soil water retention.Please select the best answer from the choices provided

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Answer: D) Tree roots improve soil water retention

There are many reasons which states that deforestation increases the risk of flood. First   , some water stay on the leaves and evaporates in to the atmosphere. Second, tree leaves reduce the impact of raindrops on the soil which causes less soil erosion.

Third, tree roots absorb water from the soil, which make the soil dry and it absorb more water rainwater. The roots of tree hold the soil in place and reduce the movement of sediment which reduce the capacity of river to break its banking. Thus, reducing the chances of flood.

The answer is D your welcome

Bees use nectar from the flowers of plants as food. As they collect nectar, dustlike pollen grains stick to their body. When they move from flower to flower, pollen is transferred to other flowers. The pollen from other flowers helps the plant make seeds. Which challenge of life does the bee help the plant meet?a. acquiring energy
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Answers

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Answer:

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Explanation:
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