Enzymes are biological catalysts. Catalysts work by lowering the amount of energy required to set off a chemical reaction.
Answer:
I would write "terrestrial/lives on land during all life stages" between the frog and pigeon branches.
Explanation:
Jaw evolution has started with fish, so i'd place that before the perch, evolution of four limbs is next and I would plate it between the perch and the frog. Evolution of an egg has ensured that organisms remain terrestrial during all stages of life and don't need to rely on water to lay their eggs. So I would place that between the frog and the pigeon. True mammary glands and true hair, as we know it formed on mammals so i'd place that between the pigeon and the rats (although synapsids evolved similar structures long before birds even existed). And lastly, I would place "walking on two legs" between rats and human branches. Because our ancestors evolved bipedalism relatively late.
Answer:
d. smooth endoplasmic reticulum
Explanation:
Organelles are structures found in inside the cell which carries out a specific function. Types of organelles include endoplasmic reticulum, Golgi body, ribosomes, nucleus etc. The function in the question is protein synthesis.
Ribosomes are the sites of protein synthesis in the cell of living organisms.
- The nucleus is involved in the synthesis of protein because it directs all the cellular processes in a cell including protein synthesis.
- Rough endoplasmic reticulum (RER) is a type of endoplasmic reticulum whose surface is attached to by ribosomes, hence, giving it its rough surface. Since ribosomes (organelle for protein synthesis) are attached to the RER, the RER are involved in protein synthesis.
- Golgi bodies are organelles that functions to package, process and sorted the proteins produced in the ribosomes.
- The smooth endoplasmic reticulum (SER) are NOT involved in the synthesis of protein because they have no ribosomes attached to their surface. Instead, they are involved in lipid synthesis.
Lead is implicated in human neurological damage. Lead is a pollutant that can cause a damage in the central nervous system. Lead is toxic to many organs of the body. It is mostly dangerous since it causes damage to the brain and peripheral nerves, which connects the brain and spinal cord to the rest of the body. Young children are particularly vulnerable to the toxic effects of lead and may suffer profound and permanent adverse health effects, especially affecting the development of the brain and the nervous system.
Answer:
Difference ;
1. The akali metals are softer than other metals. The akaline earth elements are mettalic elements found in the second group of periodic table. While transition elements don't exhibit variable oxidation states, and their velence electrons are only present in their outer shell.
Similarities:
1. They all have one electron in their outer shell
Explanation:
