A scientist traversing a remote wooded area discovers what he thinks is a new plant species. He makes observations of the plant, discovers that it produces a nut similar to an acorn, and concludes it is what type of plant?

a. Gymnosperms
b. Angiosperms
c. Brynophytes
d. Pteridophytes

b. Angiosperm

Explanation:

Acorn is the fruit of oak tree. It is a nut and bears only one seed.

Since the scientist finds that the fruit produced on the tree is a nut then it is obviously an angiosperm because:

The only groups of seeded plant are Gymnosperms and Angiosperms.

Gymnosperms produce cones and have naked seed.

The seed produced within a fruit is a characteristic of angiosperm.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.

sex cells are usually half's then they find another half and make a fertilize egg