shark review

Question 1

What are the scars and wounds on female sharks pectoral fins most likely a result from?

Answer 1

mating

Question 2

when talking about sharks what is replacement dentin and why is it important?

Answer 2

teeth replace each other when they fall out or are damaged

Question 3

what does opportunistic feeder mean?

Answer 3

they eat whenever they can

Question 4

what does generalist feeder mean?

Answer 4

eat everything

Question 5

what shark is a generalist feeder?

Answer 5

great white

Question 6

what sharks are filter feeders?

Answer 6

basking and whale

Question 7

what is the relationship between air and water and how fast sound travels?

Answer 7

sound travels faster in water because the molecules are more compressed

Question 8

which sense works from the greatest distance?

Answer 8

hearing and then smell

Question 9

what part of the sharks eye allows light to enter the eye?

Answer 9

rods in the retina

Question 10

what does the shark use its sense of taste for?

Answer 10

distinguishing between food and not food

Question 11

what organs make up the electrosensory system of the shark?

Answer 11

lateral line and ampullae lorenzini

Question 12

what distance is the sharks electroreception best used for?

Answer 12

less than 1 meter?

Question 13

explain how sharks use their electrosensing capability and in what capacity is it used?

Answer 13

perceive natural vibrations and electrical stimuli to find food and avoid predators

Question 14

whats the difference between temporal resolution in pelagic and sit and wait sharks

Answer 14

pelagic sharks have sharper and faster processing vision than sit and wait sharks do

Question 15

what organ does the shark smell with

Answer 15

nares

Question 16

explain the purpose of the lateral line

Answer 16

detects vibrations in the water

Question 17

what senses do sharks have that most vertebrates do not have?

Answer 17

electrical

Question 18

what is the name of the case that shark embryos develop in

Answer 18

mermaids purse

Question 19

how do oviparous sharks give birth

Answer 19

lay eggs

Question 20

what is the name of the process of giving birth to live young that are nourished via a yolk sac

Answer 20

aplacental viviparity or yolksac viviparity

Question 21

what is the name of the process of giving birth to live young that are nourished by a yolk sac which also attaches to the uterine wall of the female shark and what shark is known for this?

Answer 21

placental viviparity - hammerhead

Question 22

what natural process sharks possess that demonstrate they don’t have maternal instincts

Answer 22

pups are left to fend for themselves and the moms don’t get hungry

Question 23

what distinct features allow us to identify a female shark from a male shark?

Answer 23

the male shark has claspers which are external twin intermittent organs and are modified pelvic fins

Question 24

whats the life cycle of pelagic sharks

Answer 24

swim and eat

Question 25

sharks that have to continually swim to breathe are known as?

Answer 25

ramventillators

Question 26

sharks that do not have to continually swim to breathe are known as

Answer 26

buccalpharyngeal pumper

Question 27

what 2 characteristics do all sharks have in common

Answer 27

replacement teeth and skin texture

Question 28

what primary distinguishing feature do all elasmobranchs have in common?

Answer 28

cartiladge skeleton

Question 29

what is the largest internal organ of a shark

Answer 29

liver

Question 30

why do sharks not fossilize well

Answer 30

they are made of cartiladge

Question 31

how do sharks maintain buoyancy compared to fish

Answer 31

sharks liver produces squalene oil and fish have an air bladder

Question 32

what was the evolutionary advancement that allowed vertebrates to expand their diet

Answer 32

jaws

Question 33

what are the nutritional needs of pelagic vs sedentary sharks

Answer 33

sedentary need .2 to .3 percent of body mass and pelagic needs 2-3 percent

Question 34

what type of organisms belong to the subclass elasmobranchii?

Answer 34

batoids- rays/skates/sawfish

Question 35

how many different shark species exist

Answer 35

over 500

Question 36

what phylum do all sharks belong to

Answer 36

chordata

Question 37

explain the relationship between sharks and fish as far as oxygen consumption and food consumption

Answer 37

sharks need more oxygen and food than fish do

Question 38

batoids are cousins of the sharks. how do batoids move through the water?

Answer 38

flapping their pectoral fins

Question 39

what is the largest shark species to ever live on the planet

Answer 39

megalodon

Question 40

where are the shark attack compilations/documentation stored at

Answer 40

the florida museum of natural history- the international shark attack file

Question 41

what is a mermaid purse

Answer 41

a shark egg

Question 42

What film was the most destructive for sharks? What was the quote?

Answer 42

Jaws- The only good shark is a dead shark

Question 43

What is the main reason for negative encounters between humans and wildlife?

Answer 43

getting closer to each other and people messing with the wildlife

Question 44

What is the governing body that identifies threatened and endangered species?

Answer 44

IUCN

Question 45

Explain the cascading effect in relation to the introduction or removal of a species into a habitat.

Answer 45

causes a negative chain reaction

Question 46

Why are most sharks harvested and killed today

Answer 46

for their fins- shark fin soup

Question 47

When translated what does the word shark actually mean?

Answer 47

a swindling and stealing and cheating person

Question 48

Which 3 shark species are responsible for the most unprovoked bites on humans?

Answer 48

great white, tiger, bull