An immature, eight-inch, reddish-colored pine cone was knocked down from a tree during a recent storm....

An immature, eight-inch, reddish-colored pine cone was knocked down from a tree during a recent storm. Which structure or structures does the cone likely contain at this point? Select all that apply.

A) Archegonium

B) Megasporangium

C) Microsporangium

D) Integuments

Solutions

Expert Solution

Answer - B) Megasporangium and C) Microsporangium
A female cone takes 3 years to become mature.
at 1st year it will be 1 cm long , and they prepare themselves for pollination.
at 2nd year megasporophylls remains as such but they enlarges in size upto some inches
at 3rd year, they become matured. at separation of megasporophylls happens to produce seeds.
megasporangiu differentiates to form megaspore mother cell, from which archaegonium is produced- seen in 3rd year.
male cone- microsporangium attains maturity at 2nd year .
integumentsare observed in the ovule of megasporangium- so observed in 3rd year.

gladiator answered 1 year ago

Next > < Previous

Related Solutions

On July 1, 2018 a strong storm came through NW Michigan and knocked down a tree...

On July 1, 2018 a strong storm came through NW Michigan and knocked down a tree that crushed one-half of the c corporation furniture warehouse. The fair market value at the time of the storm was $500,000. The original cost of the warehouse was $600,000. The depreciation deduction that the company claimed $200,000. On Seprember 1, 2018 the company received insurance proceeds of $50,000 related to damage from the storm. The company believes the damage to half of the warehouse...

During an eight-hour shift, the proportion of time Y that a sheet-metal stamping machine is down...

During an eight-hour shift, the proportion of time Y that a sheet-metal stamping machine is down for maintenance or repairs has a beta distribution with α = 1 and β = 2. That is, f(y) = 2(1 − y), 0 ≤ y ≤ 1, 0, elsewhere. The cost (in hundreds of dollars) of this downtime, due to lost production and cost of maintenance and repair, is given by C = 10 + 30Y + 3Y2. Find the mean and variance...

During a winter storm a roof shingle breaks free from the very top of a house...

During a winter storm a roof shingle breaks free from the very top of a house . The shingle slides starting from rest down the 6.0m long icy roof that is inclined at 30°. The edge of the roof is 4.0m above ground level. How far from the base of the house does the roof shingle land?

Evaluate from the last eight weeks congressional actions on the economy. Find a recent news article...

Evaluate from the last eight weeks congressional actions on the economy. Find a recent news article explaining a bill, vote, action, or inaction by Congress, and explain how it’s allowable under the powers granted to them in the Constitution.

Write down a recent real example (from market) of a trading strategy (pick from Backspread, Straddle,...

Write down a recent real example (from market) of a trading strategy (pick from Backspread, Straddle, Strangle or Butterfly) and calculate Greeks (Delta, Theta, Gamma and Vega). Then talk a little about current market.

During the 1940s, military ships from the South Pacific accidentally introduced brown tree snakes from Australia...

During the 1940s, military ships from the South Pacific accidentally introduced brown tree snakes from Australia to the island of Guam. These snakes eat birds, lizards, and small mammals in their native range of Australia. Since no species on Guam eats the snakes, their population has grown rapidly. Researchers estimate that two million tree snakes now inhabit the island. So far, 10 species of birds and 5 species of lizards have disappeared from Guam; small mammals have also decreased in...

Shooting down planes from the ground during WWII was difficult. A timed explosive is used because...

Shooting down planes from the ground during WWII was difficult. A timed explosive is used because hitting a moving aircraft with a single shot from a cannon is nearly impossible; This explosive allows you to be less accurate. You are responsible for aiming and setting the timed fuses for anti aircraft battery (cannon). You fire a projectile that is aerodynamic enough that you can ignore air resistance. The projectile leaves the barrel at 840m/s. Your target is at an altitude...

What is the amount that Dan would have to pay Lachlan so that each received half of the total extra gains from chopping down the tree?

Lachlan has a Jacaranda growing in his yard. One of the tree limbs is growing over into Dan’s property. Dan does not like this and wants Lachlan to chop down the tree. Their respective benefits are shown below: Keeping Tree Chopping Down TreeGains to Lachlan ($) 1000 500Gains to Dan ($) 100 1,006Total ($) 1100What is the amount that Dan would have to pay Lachlan so that each received half of the total extra gains from chopping...

During the recent graduation season in Namibia a total of 8000 students graduated from three different...

During the recent graduation season in Namibia a total of 8000 students graduated from three different universities UNAM, NUST and IUM. Of the 8000 graduates, 4000 students graduated from UNAM, 3000 students graduated from NUST, while the rest of the students graduated from IUM. A total of 85 out of every 100 students from UNAM graduated from their Business School, while at NUST, 65 out of every 100 students graduated from their Business School, and at IUM, 60 out of...

During the golden age of antibiotic discovery, many new antibiotics were isolated from the soil. Recent...

During the golden age of antibiotic discovery, many new antibiotics were isolated from the soil. Recent studies have found that soil bacteria are naturally resistant to most antibotics. Some of the soil bacteria may even use antibiotics as a nutrient source. Antibiotics must kill a broad spectrum of bacteria while being absorbed harmlessly by the body. Most antibiotics were developed based on Ehrlich "magic bullet" paradigm which is suited to testing antibiotic efficacy in a lab. However, infections are more...

Subjects