Ans.
Sickle cell anemia is defined as a genetically inherited disorder that causes deformation of red blood cells (RBCs) and inadequate oxygen transport. It is caused by a mutation in the gene that encodes for hemoglobin and leads to formation of a defective protein.
The RBCs transport oxygen to the various parts of body with the help of hemoglobin molecules. Due to defective hemoglobin, blood cells become sticky and rigid, and shape like sickles. The resulting sickle-shaped cells get stuck in blood capillaries that block or slow down blood flow or oxygen transport to the body organs.
Thus, 'sickle cell anemia affects oxygen transport in the body.'
The endocrine
system is the system that comprises all the glands in the body, from the hypothalamus
pituitary, pineal, thymus, thyroid, parathyroid, adrenal glands, testes and
ovaries. These organ glands mentioned are just the few major glands in the
body. Moreover, take note of the hypothalamus which is responsible for many
functions such as hunger, thirst and other simple urges, that also regulates
the pituitary gland. How does your endocrine conserve body water? By
controlling and regulating your water intake and outtake, ensuring the amount
of electrolytes is efficient. Your hypothalamus is responsible for water
balance hence, it participates in one of the many functions such as regulating
the sweat glands excretion of sweat which is by the process of osmosis promoting
skin-temperature homeostasis.
Charles Darwin established that all species have a common ancestor. The pattern of evolution also was a result of natural selection.
Answer:
hermaphroditism
Explanation:
Some species of animals have reproductive organs associated with both sexes, and can produce both male and female gametes. These animals are hermaphrodites. Hermaphrodism is a very good breeding strategy for sexually reproducing animals with poor mobility.
The main distinction we can make about these animals is that they have integrated male and female sex organs inside. Because of this feature, they can produce cells of both sexes as needed. For example, if you find one male individual, the other will use your female organs, and vice versa.
These animals have the ability to produce gametes of both sexes and, although some fertilize themselves, in most cases need another specimen to reproduce. Almost all hermaphrodites are invertebrates, like fish or insects, and there is no mammal with this ability.
Answer:
Some plants, such as roses, have thorns on their stems or branches. These act as A. To stop animals from eating the stems.