(a) Mars; (2) is thought to have liquid water in the past.
(b) Mercury; (1) has no moons.
(c) Saturn; (5) has the moon Titan.
(d) Jupiter; (4) has over 60 moons.
(e) Neptune; (3) the farthest planet from the sun at certain times.
The planets are bodies which orbit the sun directly and are massive enough to be in hydrostatic equilibrium and to dominate its orbit. There are eight planets in the Solar System and they include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
LAMARCK's THEORY
Jean Baptiste Lamarck (1744-1829) proposed a theory which was published in "<em>Philosophie Zoologique"</em> (1809). This theory is simply known as Lamarckism. It has two main postulates:
1. Use and disuse of organs
2. Inheritance of acquired characters.
Example
He explained his theory by giving the examples:
1. Neck length of Girrafes
2. Webbed toes of water birds, and
3. Wings of penguins
Explanation
Lamarck explained that water birds use toe for swimming, with the passage of time webbed were developed in their toes. these features were then transferred to their offspring.
Drawback
Lamarck theory was based on natural observation. It did not explain the genetic basis of such characteristics.
Answer:
erosion
Explanation:
erosion is the wearing away of something by a natural force like water
Answer:
Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body. The body breaks down nutrients from food and drink into carbohydrates, protein, fats, and vitamins.
