Biology, 29.07.2019 15:00 roderickhinton
If you have ever used a compass, you know that it can be used to navigate. it does this with a needle that always points north, so you know which direction you are heading. the needle points to the north because the earth is like a giant magnet, with both north and south poles. according to current theory, the creation of earth's magnetic field is closely linked to a) particle interactions in the ionosphere b) seismic collisions within the earth's crust c) the flow of molten iron under the earth's crust d) the flow of ocean water under the earth's crust
Answers: 1
Biology, 21.06.2019 20:00
Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte
Answers: 1
Biology, 22.06.2019 13:50
The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?
Answers: 2
Biology, 22.06.2019 20:30
Which best describes somatic mutations? they are usually passed on to offspring. they can cause different kinds of cancer. they always result from point mutations. they only occur in reproductive cell
Answers: 2
If you have ever used a compass, you know that it can be used to navigate. it does this with a need...
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