Evolution occurs when?

A) There is a change in genetic frequency

B) There is a change in the environment

C) A population has remained stable over a long period of time

D) New habitats and niches became open

in pea plants tall is dominant over short. What us the phentoype of a cross between two heterozygous tall pea plants

Gram-positive bacteria have a thick cell wall that stain what color?

What is the most important role of lipids?

Why is it important for the chromosomes to condense during mitosis? Question 2 options: to facilitate DNA replication to facilitate chromosome movement to facilitate cytokinesis to facilitate spindle formation

All the air is removed in a sealed metal can. After the air has been removed, the can looks as if it were crushed. Why?

The burning of fossil fuels has harmed the environment by

What is a type of research that involves observation and collecting data but does not include control

Forms of the Ras protein found in tumors usually cause which of the following? A) DNA replication to stop B) DNA replication to be hyperactive C) cell-to-cell adhesion to be nonfunctional D) cell division to cease E) growth factor signaling to be

Which property of nervous tissue is fundamental to its function of coordinating the body's activities? O cells that are tightly packed contains extracellular matrix presence of neurons short life span

Polydactylism is a dominant trait that results in extra fingers and toes in humans. A polydactyl man marries a woman with 10 fingers and toes. They have a child that has a normal number of digits.