week 5 Flashcards

(69 cards)

1
Q

what are european honey bees used for

A

Is a Managed pollinator
Pollination services
-Main purpose (pollinating crops)
Production of honey and other hive products

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2
Q

what makes honeybees eusocial

A

Cooperative care of the brood

Overlapping generations
-Different generations alive at the same time

Division of labour
-Individuals in charge of reproduction only (queens/drones)
-Individuals only in charge of work (workers)

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3
Q

what is the population of a honey bee colony made up of

A

One queen
Thousands of workers
Hundreds of drones
A colony has 20 000 to 100 000 individuals

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4
Q

what are the different castes of honey bees

A

queen
worker
drone

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5
Q

what does a queen look like

A

Big abdomen for reproduction

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6
Q

what does a worker honey bee look like

A

Hairs for collecting pollen

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7
Q

what does a drone honey bee look like

A

Chubby
Huge eyes to identify queen
Big abdomen to hold reproductive organs (penis)

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8
Q

what type of reproduction does honey bee have

A

Haplodypoid

Fertilized eggs become female (queen, worker)
Diploid (2 sets of chromosomes)

Unfertilized eggs become male (drone)
Haploid (1 set of chromosomes)

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9
Q

what do honey bee cells look like

A

Peanut shaped cells for holding queens

Hexagon cells for everyone else

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10
Q

how many larval instars do honey bees have

A

5 larval instars

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11
Q

how long do honey bee eggs last before they hatch

A

3 days

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12
Q

how do honey bee larva move from one larval instar to the next

A

Mouts (ecdysis)

Last moult turns into pupa

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13
Q

how long does each type of honey bee take to develop

A

Drones take 24 days to develop
Workers take 21 days to develop
Queens take 16 days to develop

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14
Q

what are the characteristics of a honey bee egg

A

Oval shape
White
Vertical to horizontal position
1.2-1.8mm in size
0.12-0.22 mg weight

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15
Q

what are the parts of a honeybee egg

A

Micropyle
-Where sperm goes in to fertilize egge

Chorion
-Shell of egg

Cytoplasm with yolk

nucleus

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16
Q

what is embryogenesis

A

Development of an embryo from an egg

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17
Q

what is an embryo

A

Unhatched offspring in process of development

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18
Q

what is hatching

A

Emergence of larva (from egg) at end of embryonic development

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19
Q

what are the steps of development inside a honeybee egg

A
  1. Cleavage (from unicellular to multicellular)
  2. Formation of blastoderm
  3. Formation of a germ band
  4. Formation of germ layers
    -Endoderm
    -Mesoderm
    -Ectoderm
    Formation of organs and tissues
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20
Q

what are the characteristics of a honeybee larva

A

Comma shape
Pearly white color
Position: lateral to upright
Size: 2.7 to 26.5 mm

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21
Q

what is the weight of different honeybee larva

A

Worker: 140mg (x900)
Queen: 250mg (x1700)
Drone: 346mg (x2300)

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22
Q

what do honeybee larva eat and why is it important for development

A

Worker bees eat royal jelly during first 3 days
Queens only fed royal jelly
After 3 days workers fed worker jelly

larva have potential of becoming queen or worker based on their food

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23
Q

what are the characteristics of honeybee pupae

A

Shape: resembles adult
Color: pearly white to brown/yellow/black
Position: upright
Size: 40mm

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24
Q

what is the weight of different types of honeybee pupae at emergence

A

Worker: 120mg
Queen: 200mg
Drone: 220-290 mg

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25
what do workers do with wax for honeybee pupae
Workers cover cell with wax Once worker is ready to emerge, cuts the wax with mandibles
26
how long do honeybee workers live
5-6 weeks
27
what determines what kinds of tasks worker honeybees do
Do different tasks based on their age As they age they do more outside the next From start to finish Cell cleaning → capping brood→ tending brood and queen → receiving nectar → handling pollen → comb building → hygienic → ventilating → patrolling → guard → foraging
28
what do workers in nurse bee phase do
Feeds developing larvae Hypopharyngeal glands developed (create royal jelly) Hygienic behaviour Identify diseased/dead brood, uncap them and remove from hive
29
what do workers in field bee phase do
Forages for pollen, nectar, water and propolis -Propolis is source of protein and prevents disease -Pollen is source of energy Phase lasts 10-21 days Orientation flights Hypopharyngeal glands atrophied Fanning Guarding -Old grumpy bees Orienting
30
how long do honey bee drones live
5-6 weeks
31
what do honeybee drones do
Emergence Eats pollen and honey Orientation flights -8 days post-emergence Mating flights After mating, they die In fall, workers kick them out of hive
32
how long do winter bees live and what do they do
Lives 5-6 months Generate heat (keep queen warm)
33
how long do honey bee queens live
2-5 years
34
what do honey bee queens do
Emergence Kills other queens Orientation flights Mating flights Mates with 10-20 drones Allows genetic diversity Once in life Egg laying 2-5 days post-mating 1500 eggs/day Releases pheromones to tell workers colony is fine If queen starts to fail, workers know and make replacement
35
what kind of organism are honey bees
a superorganism, group of organisms that work together as a single entity
36
what are honey bee colonies like in spring
Small adult population The queen will start to lay eggs Start to rear brood
37
what are honey bee colonies like in summer
Strong adult bee population Peak of brood rearing Drone production Swarming -Half of population leaves and starts somewhere else Honey production
38
what are honey bee colonies like in fall
Medium adult bee population Brood rearing stops Drone production stops No more pollen, focus on honey for winter
39
what are honey bee colonies like in winter
Cluster of winter worker bees will take care of queen
40
what is pollination
Pollination = plant sex Movement of pollen from anthers (male parts) to stigma (female parts)
41
what are the parts of a flower
Petal Attracts pollinators Stigma Traps pollen Anther Makes pollen Pistil Transports pollen to ovary Ovary Contains egg cells Stamen Proves support for anther Sepals Formerly protected the flower bud
42
what are the 2 main types of pollination and the differences
Self Pollen movement within plant Cross Pollen movement between plants
43
what percent of flowering species animal pollinated
87.5%
44
what percent of food we eat come from crops benefit from insect pollination
35%
45
what is world value from pollination
$250 bil 9.5% of world agricultural production for human food
46
what are angiosperms
flowering plants
47
how old is insect pollination and why
Insect pollination likely ancient Common ancestor of all angiosperms was insect pollinated
48
when did bees and flower evolve, what is this called
Bees and eudicots (main lineage of flowering plants) diversified at the same time Coevolution
49
what are nectaries and where are they located
Glandular organs that secrete nectar Can occur along many areas of flower Sepals, petals, pistils, ovaries, receptacle
50
what is the composition of nectar
Sucrose, glucose, fructose, amino acids, lipids, phenols
51
when do flowers release nectar and why
Patterns mimic pollinator activity Release nectar at different times of day to attract different types of insects
52
what is nectar to an insect
a sugary boost
53
what are 2 examples of highly developed and specialized pollinator/flower pairs? Why did they evolve this way
Angraecum sesquipedale -Plant that has nectar at bottom of long tube -Only certain moth with long tongue can access -Moth Natural selection favors long tongue to get pollen -Orchid Natural selection favors longer nectary tubes so moth has to rub against reproductive organs Diascia floribunda -Plant that produces floral oils at end of long tube that bees need -Bees develop long lets to get at bottom
54
what are extrafloral nectaries and what are their purpose
Nectaries on outside of plant to attract insects that fend off herbivores and pests Not for pollination and attract non-pollinators
55
why are ants not good pollinators? why do some flowers still atract them
Some ants have surface chemical that kill pollen Other ants defend plants with extrafloral nectaries Decrease bee visits dramatically
56
how does foraging behavior differ between pollinating species
Number of flowers visited/minute varies between bee species Number of pollen grains deposited per single visit varies by species
57
does more honey bees always mean better pollination
Honey bees can lead to bad outcomes Not as many fertilized ovules More honey bees can cause less native pollinators in area Can cause less pollination
58
are bees the only pollinators
no
59
what are pollination syndromes? are all flowers with same syndromes related?
Flowers take different shapes to attract (and sometimes deceive) pollinators Different species of Pollinators look for certain colors and shapes to get pollen Plants independently come up with same system for attracting pollinators
60
how do pollination syndromes work
Insects (and other pollinators) learn to recognize rewards (nectar and pollen) with different syndromes
61
what is floral signal advergence
floral mimicry
62
what are 3 types of floral signal advergence (floral mimicry)
Food plant mimicry Plants look like they have reward, but don’t actually have reward Sexual mimicry Plants look and let of pheromones that look like mate Pollinator tries to mate with Oviposition site mimicry Plant mimics dead animals Insects try to lay eggs there
63
what are the 3 degrees of specialization for pollinators looking for pollen
Monolecty - one pollinator visits one plant species (rare) Oligolecty - one pollinator visits several related plant species (common) Polylecty - one pollinator visits many unrelated plant species (common)
64
what is an example of a highly specialized, monolectic species
wasps pollinating figs
65
why do wasps have to be highly specialized to pollinate figs
Fig flower inverted Wasps get in and lay eggs inside
66
what are the 2 types of reproductive systems in figs
Monoecious Each fig has both male and female flowers Dioecious Flowers only have male or female parts (not both)
67
what is the evolution of figs and wasps an example of? are there phylogenies perfectly the same?
coevolution Fig wasps cospeciated with figs but also have switched hosts Phylogeny of figs and fig wasps looks very similar
68
are all pollinators specialized?
no Many plants have open flowers Many pollinators indiscriminate
69
are relationships between specialization levels and pollinators and flowers one-to-one
no Highly specialized bees can get resources from generalist flowers