Yes water is a polar molecule
Brain is protected by skull,blood brain barrier for filtration,cerebrospinal fluids that cushion brain and three membranes called duraarchnoid and pia mater
Answer:
Chlorophyll molecules donate electrons to an electron acceptor in the reaction center.
Explanation:
Light reaction of photosynthesis takes place in the reaction centre. Light reaction may comprises of several proteins such as pheophytin, chlorophyll and quinones which act as light absorbing molecules.
The light reaction is the core of photosynthesis that produces ATP and NADPH to carry out the dark reaction for the production of high energy carbon molecules. During light reaction light photons are captured by photosystems such as photosystem I and II of chlorophyll in green plants. This photon cause the excitation of electron that flows through the electron transport chain from higher potential to lower potential and energy released by it is utilized for creating the gradient potential of H+ ions across the membrane. This gradient potential difference of H+ ions is used for the production of ATP through ATP synthase complex.
So chlorophyll molecules donate electrons to electron acceptors through the excitation of electrons from light photons in the reaction center.
Answer:
The systemic circulation is the part of the circulation system which is contrasting to the pulmonary circulation as it includes the movement of the oxygenated blood from the left ventricle to the capillaries present in the tissues through the arteries.
It also includes the return of the deoxygenated blood from capillaries of different veins to the right atrium of the heart. It provides all the blood required for carrying the nutrients and oxygen to the parts of the body to heart and heart to different parts of the body
Answer:
C. Meiosis produces new combinations of chromosomes.
Explanation:
Compared to mitosis, meiosis divides TWICE and has EIGHT stages of rather than mitosis with the regular four stages.
The end result in Meiosis produces haploid cells in which half of the amount of chromosomes are produced in each individual cell, therefore Meiosis produces new combinations of chromosomes.
A. is incorrect because Meiosis does NOT create genetically identical cells.
B. is incorrect because Meiosis creates a HALF set of chromosomes (or just half than the original amount).
D. is incorrect because DNA is not produced during meiosis.
