No links and i know this isn't actually biology 3.
Which of the following characteristics of the Sun help life to exist on Earth?

1. The Sun’s gravity keeps the Earth in a consistent orbit.
2. The Sun’s radiation provides heat to the Earth.
3. The Sun’s light shines on half of the Earth at a time.
4. The Sun’s solar flares and storms shower the Earth with additional radiation.
5. The Sun’s spots cause cooler areas on the Sun’s surface.
6. The Sun’s position in relation to the Earth and Moon causes eclipses.

Characteristics 1, 2, and 3
Characteristics 2 and 3
Characteristics 2, 3, 4, and 5
Characteristics 3, 5, and 6

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.