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 23:10
Blood has traveled from the heart to the toes. which describes the next step of the circulation process?
Answers: 1
Biology, 22.06.2019 06:00
Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time
Answers: 1
Biology, 22.06.2019 11:00
The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian
Answers: 2
Biology, 22.06.2019 11:30
Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.
Answers: 1
Computers and Technology, 10.04.2020 01:44
Mathematics, 10.04.2020 01:44
English, 10.04.2020 01:44
Mathematics, 10.04.2020 01:44
Mathematics, 10.04.2020 01:44
Health, 10.04.2020 01:44
Social Studies, 10.04.2020 01:44
History, 10.04.2020 01:45
Geography, 10.04.2020 01:45
Mathematics, 10.04.2020 01:45