The cell membrane<span> is selectively permeable to ions and organic molecules and controls the movement of substances in and out of </span>cells<span>. The basic function of the </span>cell membrane<span> is to protect the </span>cell<span> from its surroundings. It consists of the phospholipid bilayer with embedded proteins.</span>
Answer:
D.
Explanation:
Sufficient inheritable variations
Answer:
The correct answer will be the image showed two strands are wrapped in double helical form.
Explanation:
Rosalind Franklin is known for her work on the X-ray crystallography image of DNA. The x-ray image is known as Photo 51 which was taken on May 1952 by Rosalind Franklin and her student Raymond Gosling at King's College of London.
The image showed the "DNA as a wrapped structure made of two strands in helical fashion like a twisted ladder" which was used later by Francis Crick and James Watson who were nominated Nobel prize for their work on the structure of DNA.
Geotropism allows plants to correctly orient themselves for growth. The roots exhibit positive geotropism and grow towards the earth. The shoot shows negative geotropism by growing away from the earth. Phototropism occurs when plants move towards or away from sunlight.