I think the nuclear membrane begins to break down, and the pair of chromosomes look like their are floating in the air.
Answer:
Wind, Insects/animals
Explanation:
Pollination is the process by which pollen grains move from the anther(male part) to the stigma( female part).
Pollination by wind is usually made possible with flowers who have feathery stigma. The feathery stigma is easily swayed by the wind which makes it possible for it to catch pollen grains in the air.
Pollination by insects/animals is made
Possible by a form of attraction which is usually in the form of conspicuous petals and a good odor. These features attracts the insects/animals to the flowers.
Answer: XX
Explanation: Females have two copies of the X chromosome, males have an X and a Y.
Psychic stimulants include caffeine, cocaine, and various amphetamines. These drugs are used to enhance mental alertness and reduce drowsiness and fatigue.
Answer:
Step 1. A carboxyl group is removed from pyruvate, releasing a molecule of carbon dioxide into the surrounding medium. (Note: carbon dioxide is one carbon attached to two oxygen atoms and is one of the major end products of cellular respiration. ) The result of this step is a two-carbon hydroxyethyl group bound to the enzyme pyruvate dehydrogenase; the lost carbon dioxide is the first of the six carbons from the original glucose molecule to be removed. This step proceeds twice for every molecule of glucose metabolized (remember: there are two pyruvate molecules produced at the end of glycolysis); thus, two of the six carbons will have been removed at the end of both of these steps.
Step 2. The hydroxyethyl group is oxidized to an acetyl group, and the electrons are picked up by NAD+, forming NADH (the reduced form of NAD+). The high- energy electrons from NADH will be used later by the cell to generate ATP for energy.
Step 3. The enzyme-bound acetyl group is transferred to CoA, producing a molecule of acetyl CoA. This molecule of acetyl CoA is then further converted to be used in the next pathway of metabolism, the citric acid cycle.
