Answer:
1. Water(solvent) molecules travel from A across the cell membrane / semi permeable membrane to B until the concentrations of A and B become equal.2. Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.3. A transport protein is a protein that serves the function of moving other materials within an organism.
4. Active transport is the movement of materials through a cell membrane using cell membrane using cellular energy. ... transport proteins requires energy to function because it needs energy then passive transport that requires no energy at all.
Explanation:
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Answer: A) Two atoms share electrons so they can fill their outer shells
Explanation: A covalent bond is a type of bond formed by sharing equal number of electrons between two non-metal atoms so that both of them can attain a stable octet or duplet structure of noble gases.
In covalent bonding, there is no loss or gain of electrons between atoms. For example, the formation of chlorine molecule, chlorine atom has seven electrons in its outermost shell, remaining one electron to attain an octet structure of noble gases. Two chlorine atoms share one pair of electron, each chlorine atom donating one electron to form a pair so that each atom in the chlorine molecule attains an octet structure..
Index fossils (also known as guide
fossils, indicator fossils or zone
fossils) are fossils used to define
and identify geologic periods (or
faunal stages).
The procedure can decrease the odds of having a child with CF by performing an in vitro fertilization procedure and screening the embryo for the CF alleles is referred to as preimplantation genetic diagnosis.
<h3>What diseases can be detected by preimplantation genetic diagnosis?</h3>
Pre-implantation genetic diagnosis (PGD) is the testing of embryos or oocytes at the pre-implantation stage for genetic defects.
It can be used to diagnose cystic fibrosis, Tay-Sachs disease, Hemophilia, etc.
Thus, the procedure can decrease the odds of having a child with CF by performing an in vitro fertilization procedure and screening the embryo for the CF alleles is referred to as preimplantation genetic diagnosis.
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