<span>Spiral galaxies are generally classified as galaxies that are circular in nature, with a bright nucleus that is enclosed by a thin outer disc. Normal spiral galaxies and barred spiral galaxies differ in appearance because normal spirals have 'arms' that emanate from the nucleus (which looks like a sphere that has curved arms coming out of the nucleus center), while barred spirals have bars (bright line features) that go straight through the nucleus, with arms that unwind from the ends of the bar.
Elliptical galaxies look like very bright stars - they are shaped like elongated spheres, emanate a lot of light (but the brightness is concentrated in the center and dissipates the further out from the center you go), and vary in size.
Irregular galaxies are classified as such because they don't fit into either the spiral or elliptical galaxy groups. They have a wide variety of shapes and sizes, and have no inherent regular or symmetrical structure.</span>
Answer:
C - To carry nutrients to cells and wastes away from cells
Explanation:
good luck with that,,, Blood vessels, veins, and arteries are located all over the body, and most notably carry oxygen to cells and CO2 away from cells as waste.
<span>Proteins are different based on number and type of ____________ contained in their polypeptide chain(s)
</span>Amino acids
Answer:
Independent variable
An
independent variable is a condition in a scientific study that is changed or
manipulated to test the effects on the dependent variable. The experimenter
controls the value of independent variable and its value represent inputs or
causes like potential reason for variation.
Additionally, there are
tendencies that independent variables are included in a scientific study especially
if the experimenter has no intention to test their effect directly.
Angiosperm lifestyle is seasonal (die during autumn/fall) while gymnosperms are evergreen. The seeds in an angiosperm are enclosed in an ovary while gymnosperms are bare, not enclosed. Similarities are they both come from the Kingdom "Plantae" and from the Domain "Eukarya"