Answer:
Due to having no vascular tissue, which support the plant and carry water and nutrients, liverworts are low growing.
Explanation:
Answer:
Option (D).
Explanation:
Steroid hormones are derived from lipids. Testosterone and estrogen are the steroid hormones. These hormones can directly diffuse into the plasma membrane.
Steroid hormones after diffusing into the cell, binds with its receptor present in the cytoplasm. Hormone with its receptor enters inside the nucleus and results in the gene transcription.
Thus, the correct answer is option (D).
Cholesterol travels in the blood transported in molecules called lipoproteins.
Answer:
Keystone species
Explanation:
Keystone species are such species that had a large effect on the natural environment. Such species are very important species as they play key role in determining and maintaining the the structure of an ecosystem and also decide or fix which type of species will be there in that environment and what will be the number of those species in that particular community. Without these keystone species an ecosystem could completely cease or all species could not work in that same manner all-together. Wolf is one of an important keystone species in the ecosystem.
Genetic drift is best described as evolution as result of RANDOM CHANCE WITHIN THE POPULATION. Genetic drift refers to the change in the frequency of allele in a particular specie population as a result of random sampling and the random events which determine the survival and the reproduction of the members of the population.