Explain the conversion cycle of phytochrome.

Q: Explain transport in the phloem (driving forces, process, major organs involved). How is this…

A: Plants are autotrophic organisms as they are able to photosynthesize and form food. Plants have…

Q: Explain comprehensively the secondary growth in dicotyledonous plant stem from the very early stage…

A: Dicotyledonous Stem The transverse section of a typical young dicotyledonous stem shows that the…

Q: Explain in detail the mechanism of transport in phloem?

A: Food is synthesized in the green parts of a plant. The non-green parts are depended on the…

Q: Discuss the importance of the phytochrome system.

A: Phytochrome system helps the plants to sense and regulate their physiology according to the level,…

Q: WRITE ABOUT A THEME: INTERACTIONS In a short essay(100–150 words), summarize phytochrome’s role in…

A: Phytochromes are a class of photoreceptor in plants, which help to detect light. They are sensitive…

Q: Difference between positive phototropism and negative prototropism?

A: Tropisms are either  positively or negatively  movements of the  organisms,parts of plants or organs…

Q: Which parts of the plant would you find the phytochromes highly concentrated? Why? *

A: Phytochromes  It is a photoreceptor, a pigment that plants and some algae and fungi use to detect…

Q: a. What are the two basic components of phytochrome?  b. Explain how phytochrome responds to…

A: Phytochrome is a photomorphogenetic pigment that absorbs red/far-red light and induces…

Q: Describe xylem and phloem, including their cell types and the solutions they carry.

A: Plants are multicellular and eukaryotic organisms. Plant body is made of shoot and root. Shoots are…

Q: What is a phytochrome? How do the two forms of phytochrome help control the plant life cycle?

A: Plants perform many activities with the help of light, other than photosynthesis. They can…

Q: What is phototropism?

A: Introduction  In this question we have to explain phtototropism.

Q: Describe the mutualistic relationship between Rhizobium and legumes.

A: Given: The mutualistic relationship between Rhizobium and legumes.  Mutualism is a type of…

Q: Discuss the factors responsible for ascent of xylem sap in plants.

A: The ascent of water in the xylem is caused by the transpirational pull of the atmosphere. It is…

Q: Describe how phytochrome allows a lowering plant to detect the photoperiod.

A: Phytochromes are defined as a class or group of photoreceptors present in plants, bacteria, and…

Q: Explain the secondary growth of stems.

A: Plant, (realm Plantae), any multicellular eukaryotic living thing described by photosynthetic…

Q: Discuss about the Phytochrome control of growth pattern ?

A: The plants consist of roots, stem, leaves, fruits and flowers. The conduction system in plants are…

Q: Describe various stem modifications associated with food storage, climbing and protection.

A:

Q: Pfr, the active state of _______________, forms when red light is absorbed. (a) photosystem I (b)…

A: Phytochrome is a blue-green pigment present in plants that plays a crucial role in stem elongation,…

Q: Identify the potential role of phytochrome in plant flowering.

A: Phytochrome is a special type of photoreceptor found in plants, fungi as well as certain bacteria.

Q: Explain how phytochrome is afected by red wavelengths of light.

A: Plants are the primary producer of nature. They absorb the environmental light conditions by the…

Q: Explain what phytochrome is and how it functions

A: Photoperiodism is the effect or requirement of relative length of day and night on flowering.  The…

Q: Describe the role of phytochrome in flowering, including a brief discussion of phytochrome signal…

A: Phytochromes belong to photoreceptors, which function to detect light in fungi, plants, and…

Q: Explain about phototropism ?

A: Ans: Phototropism: The orientation of organisms and plants towards or away from light is referred to…

Q: Write the functions of phytohormones.

A: phytohormones:  They are the chemical messengers which coordinated the cellular activities .They…

Q: Consider the pressure flow model of phloem transport. How do sugars and water enter the phloem from…

A: Introduction: Xylem is responsible for the transport and storage of water-soluble nutrients in…

Q: What is the adaptive significance of phototropism?

A: Phototropism refers to the phenomenon of movement (bending) of light towards or away from light. If…

Q: Define the Cohesion-tension model of xylem transport ?

A: Plants have tissues to transport water, supplements and minerals. Xylem transports water and mineral…

Q: Which type of phytochrome is biologically active and name the type of phytochrome present in dark…

A: Phytochromes are the photoreceptors of plants that absorb red or far-red light. It regulates…

Q: Describe the three phases of plant degradation and SOM formation.

A: Soil organic matter (SOM) is the portion of soil organic matter, consisting of plant and animal…

Q: Would a defoliated plant respond to photoperiodic cycle? Why?

A: Light plays an important role in the development and growth of plants. Each plant requires a…

Q: Explain primary and secondary growth in plants.

A: Growing occurs in plants as the stems and roots lengthen. Some plants also increase in thickness…

Q: What are the advantages of vegetative propagation?

A: The plant parts such as roots, stem, and leaves are called vegetative organs to distinguish them…

Q: Explain how endodermis helps control the amounts and types ofsubstances that enter xylem.

A: Xylem is the tissue in plants that transports water and nutrients from the roots to the rest of the…

Q: What are the TWO (2) light regions detected by phytochromes and identify photoreceptor responsible…

A: Question: What are the two light regions detected by phytochromes? Phytochromes: These are the class…

Q: How can phytohormones maximize the growth and development of their plants without compromising the…

A: The growth in plants is irreversible i.e increase in size. Many factors influence the growth of…

Q: If the tension in the xylem vessel becomes too great, gas bubbles will form. Explain this phenomenon…

A: Xylem is the vascular part of the plant that helps in the transportation of the water from the roots…

Q: By what the translocation in phloem is achieved?

A: The short distance transport occurs through diffusion, cytoplasmic streaming and active transport…

Q: Opening and closing of pores is a function performed by:         I.   Stomata       II.…

A: Stomata are cellular structures present in the epidermis of the leaves. They are involved in the…

Q: The main photoreceptor that triggers phototropism is a ________. a. phytochrome b. cryptochrome c.…

A: Photoreceptors are the retinal cells that respond to light. The presence of significant volumes of…

Q: Describe the composition of humus and its importance in soil.

A: Humus is a material in soil which is rich in organic material and nutrients. It is black or brown in…

Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.