Answer:
Explanation:
1.) All organisms differ in traits such as size and behavior.
2.) No two individuals are exactly alike.
3.) There was a gradual change in each species.
4.) Fossils were different from the living animals. However, these fossils had many similarities to modern forms of life.
5.) Species on the Galapagos Islands resembled species on the mainland but they were different in certain characteristics.
6.) Some organisms became isolated on many islands.
Answer: reflex (involuntary) action
Explanation:
Salivation, after smelling baked cookies is best described as a reflex action, i.e it is a rapid, automatic and unconscious response that would always occur regardless of time or environment.
Other examples of reflex actions are
- blinking of the eye
- withdrawal of hand from hot objects etc
Ethylene gas in biology, is known as a hormone. Hormones, as they do in humans, cause growth. Producers of produce use a process that they "gas blast" the fruit or veggies to have them mature faster so they can go to resale faster. Produce that is exposed to ethylene gas isn't as flavorful, but they do make a quick alternative to slow ripening.
<span>Ethylene gas does not take away flavor, but actually adds flavor by breaking down starch into sugar using the enzyme alpha-amylase. This is the reason why produce markets use ethylene to ripen fruit when they arrive so the fruit can obtain their flavor when they hit the shelves. If ripening occurs naturally, fruits would sit on the shelf longer, and in the business world that hurts the inventory turnover rate. Ethylene causes fruit to RIPEN faster, spoiling occurs at the end of the ripening process.</span>
Answer:
Hagfish and Lamprey
Explanation:
Vertebrates are the organism which posses vertebral column or the spinal cord in their skeleton.
The earliest vertebrates had the cranial structures or head but they lacked the vertebral columns and the jaws. These earliest vertebrates lived around 500 to 600 million years ago.
The earliest vertebrates which lacked the vertebral columns and are still alive are the Hagfish and the sea lampreys. These are considered the earliest vertebrates as they lacked the jaws.
These jawless fish are the ancestors of the cartilaginous and bony fish which later developed into amphibians and other groups of animals.
Thus, Hagfish and Lamprey are the earliest vertebrates.