<u>Answer:</u>
<em>Scientists are constantly learning more about fossils to understand the evolution of earth and other living species.</em>
<u>Explanation:</u>
It helps to study the structure of the organisms that are already extinct. Fossils are the conserved remains or traces of animals, plants, and other organisms that exist no more.
Fossils are the significant proof for evolution as it demonstrate that organism on earth was unique from the organism found on earth today. It is also used to study the tectonic history.
8 chromosomes. In reality each egg and sperm have 23 chromosomes each in order for produce a healthy zygote
Homeostasis is the equilibrium of a cell.
Autotrophs make their own food through photosynthesis.
Mitochondria undergoes cellular respiration and is often referred to as the "powerhouse of the cell".
Answer:
The cell type I work with (chondrocytes) are really similar between different species. The tissue they make is very similar between species and that is why they are a great model for looking at human joint tissues. In terms of the basic elements of the cell, all animal cells are very similar, i.e. they do not have a cell wall and they have a nucleus. Dogs have different features to us because they have adapted and evolved to have the features they have. For example, when a puppy is developing, cells receive signals to move to one end of the puppy and develop the tail. A long time ago our ancestors had tails but over millions of years we have lost that feature because we don’t need it to survive.
Explanation:
Answer;
A. Alice carried the recessive allele
Explanation;
-Hemophilia is an inherited bleeding disorder in which one lacks or have low levels of clotting factors. This keeps the blood from clotting. It is inherited as an X-linked recessive trait.
-X-linked recessive genetic disorders are conditions caused by an abnormal gene on the X chromosome. Females who have a disease gene present on one of their X chromosomes are “carriers” for that disorder. Carrier females usually do not display symptoms of the disorder because they have another copy of the gene that can usually compensate for the copy with the disease-causing change or mutation.
-A male has only one X chromosome and, if he inherits an X chromosome that contains a disease-causing gene, he will develop the disease. Males with X-linked disorders pass the disease gene to all of their daughters, who will be carriers if the other X chromosome from their mother is normal.