Answer:
Igneous rocks are the cooling and hardening of magma or lava and sedimentary rock is made of sediment cemented together
Explanation:
The three types of rock are igneous, metamorphic and sedimentary. Igneous rock is formed by the cooling and hardening of magma and lava. Examples include granite and basalt. Metamorphic rock is formed when other rocks are exposed to high heat and pressure, causing a chemical change in the rock. Examples include marble and gneiss. Sedimentary rock is formed when sediment is cemented together by minerals. Examples include sandstone and limestone.
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Answer:
a) Teeth arose from the rough scales of ancestral sharks.
b) Skeletal developments leading to the amphibian movement onto land probably evolved from lobe-finned fishes.
d) The anterior gill arch formed the basis for the evolution of the vertebrate jaw.
Explanation:
The animals we know today have physical characteristics that are evolutionary adaptations of characteristics of their ancestors, which have undergone a series of evolutions and modifications over the years giving rise to new species that have resulted in the species we know today. This process of evolutions and adaptations also happened with the ancestral species of fish, which allowed that today, they had characteristics such as teeth and jaws. Many of these evolutions occurred even in different species, such as the evolution that allowed the amphibians to have a skeleton, which evolved from the spine fins of fish.
A common symptom that would alert the nurse that a preterm infant is developing respiratory distress syndrome is expiratory grunting.
An audible grunt (forced expiratory sound) in a newborn is a crucial indicator of pulmonary disease and reveals a small lung volume or functional residual capacity (FRC). The baby's FRC rises when breathing against a partially closed glottis, maintaining the alveoli's patent state.
In an effort to maintain FRC and avoid alveolar atelectasis, the glottis suddenly closes on expiration, causing a grunting sound. Achieving and maintaining physiologic FRC is crucial in the management of respiratory illnesses with poor compliance, such as RDS or TTN, because lung compliance is worse at very low or very high FRC.
Learn more about expiratory grunting here;
brainly.com/question/28064831
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Explanation:
Smooth muscle can be found in the walls of hollow organs and passageways, they can contract and they have fibers of actin and myosin tuning though it arranged in an staircase form.
In the images I added you can see how smooth muscle looks when observed in a microscope, wider in the middle and elongated at the ends, and the staircase arrangement.
I hope you find this information useful and interesting! Good luck!
