What is a hormone and what is its purpose? Hormones are chemical substances that affect the activity of another part of the body (target site). In essence, hormones serve as messengers, controlling and coordinating activities throughout the body. (See also Endocrine Glands.) Which gland produces the most hormones? Pituitary What hormone is called the love […]

What sedimentary rock is formed from weathered sediment? Clastic rocks Are sedimentary rocks formed from other rocks? Sedimentary rocks are formed from pieces of other existing rock or organic material. There are three different types of sedimentary rocks: clastic, organic (biological), and chemical. Why sedimentary rocks are formed from other rocks? Sedimentary rocks are formed […]

How does the color of light affect plant growth experiment? The hypothesis was that if a plant grew under a green light, then it would grow faster than plants under other lights. The plant that grew the fastest was the plant under the red light. The results of this experiment show a slight preference for […]

Where is ocean water most saline? The saltiest locations in the ocean are the regions where evaporation is highest or in large bodies of water where there is no outlet into the ocean. The saltiest ocean water is in the Red Sea and in the Persian Gulf region (around 40‰) due to very high evaporation […]

What are the steps of DNA replication in order? There are three main steps to DNA replication: initiation, elongation, and termination. In order to fit within a cell’s nucleus, DNA is packed into tightly coiled structures called chromatin, which loosens prior to replication, allowing the cell replication machinery to access the DNA strands. What are […]

What is not present in all viruses? Without a host cell, viruses cannot carry out their life-sustaining functions or reproduce. All viruses contain nucleic acid, either DNA or RNA (but not both), and a protein coat, which encases the nucleic acid. Some viruses are also enclosed by an envelope of fat and protein molecules. Which […]

How does climate change affect ocean salinity? Records showed that the saltier parts of the ocean increased salinity — or their salt content — by 4 percent in the 50 years between 1950 and 2000. If the climate warms by an additional 2 or 3 degrees, the researchers project that the water cycle will turn […]

What is the process of RNA editing? RNA editing (also RNA modification) is a molecular process through which some cells can make discrete changes to specific nucleotide sequences within an RNA molecule after it has been generated by RNA polymerase. It occurs in all living organisms and is one of the most evolutionarily conserved properties […]

What are three unifying themes found in biology? The three major themes in the study of biology are diversity, interdependence, and evolution. Diversity concerns the observation and classification of the many different species of living things on Earth. What field of biology does the research fall into? What field of biology does this research fall […]

What are the 2 types of cell transport? There are two major types of cell transport: passive transport and active transport. Passive transport requires no energy. It occurs when substances move from areas of higher to lower concentration. Types of passive transport include simple diffusion, osmosis, and facilitated diffusion. What transports large molecules out of […]