Most of the worlds fossil fuels are made up of Coal.
Today, the Earth's axis is tilted 23.5 degrees from the plane of its orbit around the sun.
Why temperature affects heart rate in ectothermic organisms? If the temperature is within the optimal range for enzyme activity more ATP will be produced and the heart will beat faster due to increased metabolic activity and energy availability.
The answer is Fine Motor Skills
The child is using his wrists, hands and fingers in coordinated movements to place the pegs in the holes which do not require gross motor skills. Unlike fine motor skills that encompass small movements, gross motor skills involve a coordinative movement of more substantial body parts such as legs, arms, and the body.
Answer:
e) Invertebrates lack a nervous system
Explanation:
One of the main characteristics of invertebrates is that they don't have a backbone. Backbones belong to the skeletal system. A totally different story is the nervous system which runs inside the backbone. Although the more complex nervous systems appear in vertebrates the simply fact of having eyes like crabs or insects implies having a nervous system that can control them.