The plasma membrane has a double layer of phospholipids with proteins dispersed throughout. These proteins help increase the durability of the membrane, as well as help with filtration.
Answer:
Cancerous tumors are malignant, which means they can spread into, or invade, nearby tissues. In addition, as these tumors grow, some cancer cells can break off and travel to distant places in the body through the blood or the lymph system and form new tumors far from the original tumor.
Answer/Explanation:
Density-dependent limiting factors are non living and biotic factors that affect the size and growth of a population based on the population density, while density-independent limiting factors are those factors that do not depend on the density of a population before they can have an effect on the growth and size of the population.
Examples of density-dependent limiting factors are predation, disease, Parasitism, competition. These rely on the density of a population in order to affect the growth and size of a population.
On the other hand, examples of density-independent limiting factors are pollution, flood, temperature.
Forest soils because forests cover most of the land but not as much as the ocean
Answer:
1) pollen grain (A), stigma (B), pollen tube (C), Ovary (D)
The pollen grain is a male reproductive part while ovary is the female reproductive part.
2) When a pollen grain lands on the stigma of a flower, a pollen tube begins to grow. It grows through the style until it reaches an ovule inside the ovary.
3) The pollen tube is a tube that transports the male gamete cells from the pollen grains to the ovule (female gamete) inside the ovary.
The nucleus of the pollen passes along the pollen tube and fuses with the nucleus of the ovule. This process is called fertilisation.
4) After the fertilisation, female parts of the flower develop into fruit and ovules become seeds.
