Answer:
Actually, water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
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Answer:
Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system.
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Answer:
in the cytoplasm of prokaryotes and in the nucleus of eukaryotes.
Explanation:
this only occurs in replication of the DNA
Answer:The NASA astronauts from the Apollo missions that landed on the moon experienced 1/6 of the gravitational force that they usually experience on Earth. Provide an explanation for the astronaut's reduced gravitational force.
Explanation:
The very inside of the flower, at the center is the ovary. The ovary extends upwards to become the style and then the stigma on top of that. All three of these structures combined are called the pistil. Surrounding the style can be one or more filaments each with an anther on the top which contains the pollen. Around all of those structures are the petals, when combined are the corolla. At the base of the corolla, there are green leaves called calyx.directly under the ovary is the peduncle or stem. Please see the attached diagram for more information.