Question 1
according to fossil evidence, the evolution of eukaryotic cells occurred about ye...
Biology, 02.10.2019 04:50 maystrenko53
Question 1
according to fossil evidence, the evolution of eukaryotic cells occurred about years ago.
3.2 to 6.1 million
250 to 500 million
1.2 to 1.5 billion
3.5 to 3.8 billion
1 points
question 2
the protists include
heterotrophs.
autotrophs.
both a and b
none of the above
1 points
question 3
which of the following statements describes ciliates?
they have no cell walls.
they are unicellular.
they are heterotrophic.
all of the above
1 points
question 4
what do ciliates use small cilia for?
energy
locomotion
reproduction
all of the above
1 points
question 5
euglenoid chloroplasts are surrounded by membranes.
no
four
two
three
1 points
question 6
some autotrophic euglena species become when light levels are low.
inactive
heterotrophic
saprophytic
none of the above
1 points
question 7
red tides release into the ocean.
nutrients
carbon dioxide
oxygen
toxins
1 points
question 8
phylum amoebozoa traditionally included
amoebas.
radiolarians.
foraminiferans.
all of the above
1 points
question 9
are the most numerous unicellular algae in the oceans.
amoebas
golden algae
diatoms
none of the above
1 points
question 10
which of the following have numerous hair-like projections from their flagella?
diatoms
golden algae
water molds
all of the above
Answers: 1
Biology, 21.06.2019 17:00
In tossing one coin 10 times, what are your chances for tossing a head? a tail? 2. in tossing one coin 100 times, what are your chances for tossing a head? a tail? 3. in tossing one coin 200 times, what are your chances for tossing a head? a tail? deviation = ((absolute value of the difference between expected heads and observed heads) + (absolute value of the difference between expected tails and observed tails)) divided by total number of tosses. this value should always be positive. 4. what is the deviation for 10 tosses? 5. what is the deviation for the 100 tosses? 6. what is the deviation for 200 tosses? 7. how does increasing the total number of coin tosses from 10 to 100 affect the deviation? 8. how does increasing the total number of tosses from 100 to 200 affect the deviation? 9. what two important probability principles were established in this exercise? 10. the percent of occurrence is the obtained results divided by the total tosses and multiplied by 100%. toss the coins 100 times and record your results. calculate the percent occurrence for each combination. percent head-head occurrence: percent tail-tail occurrence: percent head-tail occurrence:
Answers: 1
Biology, 21.06.2019 20:10
Which best describes a rhinovirus? o a. a virus that causes a common cold o b. a protective shell around a virus o c. a tube the comes off a virus o d. a piece of dna transferred by a virus
Answers: 1
Biology, 22.06.2019 08:50
Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.
Answers: 1
Biology, 22.06.2019 14:30
The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping
Answers: 1
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