Explain how trees can be produced and yet the smallest trophies level in a pyramid of numbers

Which mutation causes either the inclusion of an extra chromosome in offspring or the deletion of an entire chromosome?

Which layer of earths atmosphere contains no water vapor, has the atmospheric pressure less than. 1 atm, and has an air temperature increases with altitude

Sexual selection can favor the evolution of elaborate traits that natural selection acts against. How does sexual selection produce such extreme trait values in the face of opposing natural selection?

Phosphorus is very important for living things because living organism need phosphorus to a. cycle energy b. perform transpiration c. form DNA and RNA d. make carbohydrates

Which statements describe long-term environmental changes

True or false: the northern lights are caused by earth magnetic field

What is the name of the family that humans are classified in?

Which process produces a greater number of offspring? chromosome duplication asexual reproduction gamete formation sexual reproduction

Aquatic plants do not contain a) chloroplasts b) cells c) lignin d) nuclei e) chlorophyll

Jennifer's baby brother had infantile Tay-Sachs disease (TSD), but Jennifer did not have the disease. When Jennifer grew up and got married, her third child also had infantile TSD. How is this possible? A.