Answer:
osteoblasts.
Explanation:
PTH is produced to prevent hypocalcemia, ie low blood calcium concentrations, which can lead to seizures and heart failure in more severe cases and when untreated. In bone, PTH stimulates and determines the activation and recruitment of osteoclasts (cells that participate in the process of absorption and remodeling of the bone matrix), which results in bone resorption. However, mature osteoclasts do not have PTH receptors, unlike their bone marrow progenitors, known as monoblasts, which undergo the action of PTH leading to stimulation and differentiation in mature osteoclasts.
Answer:
There are several ways to measure fitness; for example, “absolute fitness” measures the ratio of a given genotype before and after selection while “relative fitness” measures differential reproductive success — that is, the proportion of the next generation's gene pool that is descended from a particular organism
Explanation:
Both are seed producing
both are unisexual,however angiosperms can be bisexual
angiosperms are flowering while gymnosperms are non-flowering
angiosperms seeds are enclosed in an ovary while gymnosperms are not enclosed
angiosperms are seasonal while gymnosperms are evergreen
<span>Physical Digestion - Physically breaking down (eg chewing)
Chemical digestion - chemically breaking down (eg chemicals in the stomach)</span>
Answer:
Earth early atmosphere was like it had almost no atmosphere. The surface was molten. As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today's atmosphere.