l need help with question 15,16, and 17 please explain thank you a) The formatio
ID: 269941 • Letter: L
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l need help with question 15,16, and 17 please explain thank you
a) The formation of the vascular network in an expanding leaf blade, and the formation of a new ular strand in the stem is atributed to C) Cytokinin 15) When a rnew leaf grows on a stem, the vascular system inin D) Strigolagsang E) Abscisic acid A) is present intheprim rash and expandswiththerew leaf B) grows up from the pre-exising vascular system sand into the drohe p D) Dividing cells in E) Homone gradients trigger a line of apopeosisv programm pre-existing vascular sysiem vasculatr puash downthrough the stem toward the preexisting vascular system gradients trigger a line of apoptosis/programmed cell death to from the new Pattern n any organism is a big deal. Where the endodermis forms in the will not forn on the leaf epidermis are both examples of A) Proteins produced in one cell and migrating to adjacent cells to control cell tate B) Auxin gradient s created by PIN proteins and polar auxin transport to control cell fate regulators shuttling between the cytoplasm and nucleus to control gene expression mutual anta llic acid and abscisic acid controlling cell fate E) Cell fate predetennined by cell lineages established during embryogenesis 17) Strigolactone is a hormone that promoxes branchine During the strigolactone signal transduction cascade, in the presence of strigolactone A) Histidine phosphor-transfer proteins shusttle into the nucleus to promote gene expression B) Cells in the immediate area of stimulation commit suicide in a hypersensitive response C) Vascular tissues develop is a process called "strigolactone D) Target proteins are tagged with ubiquitin and targeted to the proteosome for degradation cut off the head of your prize race horse and leave it under your bedsbeets for you to find when you wake up in the morning f you grow an apple tree from a seed, you likely will not get flowers or fruits for four to eight years A) Vernalization is required B) A specific photoperiod is required 18) I A juvenile period must be passed through D) A suitable pollinator must be present E) A suitable period of cold temperature must be passed through. This means that Arabidopsis Arabidopsis is a long day plant A) seeds will germinate quickly during long days 19) seeds will stay dormant during long days plants will flower during long days plants will propagate vegetative during long days E) plants will begin to senescence during long days 20)You are d with a variety of chrysanthemum that is a typical short day plant and you are tasked with determining phytochromex red light receptors) o involved in the response. Describe the experiments you would do (2 points) rcrxptochromè (blue light receptors) areExplanation / Answer
15- B- grows up from the existing vasular system Into the new leaf.
Development of vascular system involves a complex sequence of inductive and differentiating signals leading to vasculogenesis .As the plant grows ,new vascular tissue diferentiates in the growing tips of the plant and the new tissue is aligned with the existing vascular tissue .
16 - B Auxin gradients created by PIN proteins and polar auxin transport to control cell fate.
The role of PIN-mediated auxin transport in other plants is not well understood, but studies in a wider range of species have begun to illuminate developmental mechanisms across land plants. PIN genes are found exclusively in the genomes of multicellular plants and play an important role in regulating asymmetric auxin distribution in multiple developmental processes, including embryogenesis, organogenesis, tissue differentiation and tropic responses.
17) C- Vascular tissues develop in a process called stringolactone canalisation
In presence of strigolactones, the plant would be prevented to overgrowth and develop excessive branches, but when is not present, the axillary bud will start inducing abnormal branching
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