What is the function of the blood-brain barrier? preventing blood loss during injury regulating blood flow through the brain keeping brain blood separate from body blood keeping foreign particles out of the brain?

Small organisms have smaller cells than large organisms true or false

1. Nervous systems are required by animals to respond to stimuli and have complex senses such as taste, touch, sight, smell, or sound. These are carried by nerves to and from the brain and spinal cord.

A grown tiger began its life as a single fertilized egg. Explain why a tiger looks so much different as an adult than it did as a single fertilized egg

Gulls dont eat herring but they are still connected by the food web. How might gull populations be affected?

What was the significance of collisions of dust, rock, and ice during Earth's formation? A. to modify the density of materials present on Earth B. to facilitate heat absorption from the surrounding space C.

Describe what is happening to the chromosomes during each sub-phase of Meiosis I and Meiosis II.

What accounts for genetic biodiversity existing in modern multicellular organisms?

Torri and Tamara are both performing scientific investigations on the learning capabilities of mice. In Torri's experiment, she sets up two knobs in a cage with a mouse. When the mouse touches the knob on the left, it receives a small shock.

What did Chargaff discover while studying bases in the DNA of organisms?

Russia's system of government and identify its basic structure.