The undulations on the cerebral cortex (the outer layer of the brain) are called gyri (ridges) and sulci (gorges). Also called the grey matter, the cerebral cortex is the core of brain functioning region with approximately 20 billion neurons.
It is believed that the cerebral cortex is highly folded to accommodate many neurons.
In the 9th century, it was suggested that when organisms change, they are adapting to survive.
Lamarck, was the researcher that created the theory of acquired characteristics.
Malthus first proposed the idea that overpopulation <span>contributed to the lack of resources and interfered with survival, but he applied this to only humans, Darwin was the first to apply this to all organisms.</span>
Answer:
I and III only
Explanation:
Crop rotation is a farm practice that involves cultivating different species of crops on the same land at different seasons. In other words, the different crops are rotated. Crop rotation is done for various reasons including; improvement of soil fertility, pest and disease control etc.
In this case, a crop rotation of various grains and legumes would be an appropriate solution for the following problems:
- The nutrients in the soil on a farm are being depleted: Legumes are known to be rich in nitrogen and hence add nitrogen to the soil due to the nitrogen-fixing microbes in their roots. Hence, rotating between grains and legumes can help return the depleted nutrients (by grains) to the soil.
- A particular kind of pest is infesting the soil on a farm: Most pests are usually crop-specific, hence, planting only one type of crop can make that soil be infested with a particular kind of pest. However, rotating between crops such as grains and legumes can make a particular pests become scarce or less populated.
Answer:
D. acetyl CoA, NADH, H+, and CO2.
Explanation:
Pyruvate formed by the glycolytic breakdown of glucose enters Kreb's cycle in the form of acetyl CoA. Conversion of pyruvate into acetyl CoA occurs in the mitochondrial matrix and the reaction catalyzed by the pyruvate dehydrogenase complex (PDH). It is an oxidative decarboxylation of pyruvate.
The PDH complex is composed of multiple copies of three enzymes. The enzyme complex catalyzes an irreversible oxidation process in which the carboxyl group of pyruvate is removed as a molecule of CO2 and the two remaining carbons become the acetyl group of acetyl-CoA. Here, NAD+ serves as the electron acceptor and is converted into NADH.
