Answer:Petroleum, also called crude oil, is a fossil fuel. Like coal and natural gas, petroleum was formed from the remains of ancient marine organisms, such as plants, algae, and bacteria. Over millions of years of intense heat and pressure, these organic remains (fossils) transformed into carbon-rich substances we rely on as raw materials for fuel and a wide variety of products.
Explanation:
The Simple cuboidal epithelium<span> forms thyroid gland and secretes hormones is shown in the picture attached.
</span><span>Its main functions are secretion and absorption. It has an abundance of organelles to facilitate active transport frequently found in glands, such as salivary glands, the thyroid gland, and the pancreas, where its function is secretion.
</span>
The epithelial<span> cells tend to be </span>cubical<span> in </span>form after they are inactive, however additional <span>columnar </span>after they are<span> actively secreting hormones.
The </span>epithelial<span> cells accumulate iodine from the blood and use this </span>component within the<span> synthesis of thyrog</span>lobulin<span>, </span>an oversized compound protein that<span> forms the </span>mixture<span>.</span>
Answer:
38 A
39 B
40 C
41 E
42 D
Explanation:
Ngl the first few answers seem sus but I know these are correct
Answer:
In nature, the oxygen element mainly occurs in gaseous form. While hydrogen is also formed of two atoms and is also a colorless, odorless gas just like oxygen. But hydrogen is generally found as water.
Explanation:
Oxygen and hydrogen are commonly diatomic molecules, not compounds. Hydrogen is the most abundant and light of all elements in the earth. Hydrogen reacts with oxygen to form water. Hydrogen too forms parts of many compounds such as acids, hydrocarbons in organic compounds and so on. About 10% by mass of human body is composed of hydrogen. Oxygen, as it already known is the elements responsible for the survival of living organisms. It forms about 65% of human body by mass.
They are classified as Invertebrates.
Answer choice B. Invertebrates is correct.
Also here is a bit more information which is a list of invertebrate species..
<span>1. Clams,
</span>2. Squids,<span>
3. Crustaceans,
4. Arthropods,
</span><span>5. Insects,
</span><span>6. Worms,
7. Jellyfish,
</span>
I hope this helps!