Answer:
The correct answer will be option-D.
Explanation:
Photosynthesis proceeds in two stages: light-dependent and light-independent reaction.
The light-dependent begins when the chlorophyll pigment of the photosystem absorbs light energy. This absorption causes the excitation of the electrons provided by the chlorophyll molecule.
The excited electrons accepted by electron acceptor molecule from reaction center and a chain of electron flow begin called electron transport chain.
This transport of electrons creates a scarcity of electron in photosystem which causes splitting of the water molecule as a result of which oxygen gas is released.
Thus, option-D is the correct answer.
Answer:
A. ATP is a polymer of phosphates.
Explanation:
ATP is not a polymer of phosphates. It is a rather a complex organic molecule that has its main function to provide energy.
Starch and glycogens are polysaccharides or polymers of glucose or simply put, they have glucose subunits.
Nucleotides are biological molecules consisting of 3 major sub units which are the nitrogenous base, the phosphate acid and the 5 carbon (ribose) sugar. They are the building blocks of DNA and RNA and hence monomers.
Amino acids are basically organic compounds that contain amine (-NH2) and carboxyl (-COOH) functional groups, along with a side chain (R group) specific to every amino acid molecule. They are bond together by a peptide bond between the -NH2 and -COOH group to furthet form polypetides. Proteins in the same vein are called polypeptides which is a chain of amino acids.
Answer:
D. the natural resources available in an ecosystem.
Explanation:
Carrying capacity can be defined as a species' average population size in a particular habitat. The species population size is limited by environmental factors like adequate food, shelter, water, and mates. If these needs are not met, the population will decrease until the resource rebounds.
Answer:
The animal was most likely an omnivore.
Explanation:
From the dentition, the animal is most likely an omnivore. Carnivores have large and sharp canines for tearing of flesh while most herbivores lack canines altogether.
Answer:
1. the middle piece contains the chromosomes. FALSE
2. the tail contains the mitochondria. FALSE
3. the acrosome is next to the tail. FALSE
4. the head contains 46 chromosomes. FALSE
5. the acrosome is next to the nucleus, and the head contains 23 chromosomes. TRUE
Explanation:
The major parts of a mature spermatozoan in human males are the head, middle piece and the tail. The head of the sperm is a flattened and pointed structure that contains a nucleus. There are 23 chromosomes present in the nucleus. Chromosome surrounds the anterior two-thirds of the nucleus. The acrosome is a caplike vesicle and is filled with hydrolytic enzymes that help a sperm during fertilization. The middle piece contains mitochondria that provide the energy (ATP) for locomotion of sperm to the site of fertilization and for sperm metabolism.
