Martha is telling her teacher how an animal cell is like a house. Which part of the animal cell is like the doors and windows in Martha's house? Cell membrane Cytoplasm Nucleus Vacuole

Identify the animal below that is not in the same class as the others. select one of the options below as your answer: a. crayfish b. crabs c. scorpions d. lobsters c. scorpions should not be in the list, as its not aquatic animal

Through which parts of the heart does oxygen poor blood flow

True or false, oxygen diffuses directly into body tissues from blood in animals with an open circulatory system

Which of the following is an example of an epigenetic change in eukaryotes? A) a loss of an AT base pair from a gene B) the addition of methyl groups to cytosines in the promoter region of a gene C) the substitution of an AT base pair by a GC base

Controls are defined as ___. A) variables scientists observe for changes B) things that change during an experiment C) variables that are changed by the scientist D) things that are kept constant during an experiment

Which describes a group of organisms that is considered a species? They can breed and produce offspring that can breed. They are members of the same community. They live in the same ecosystem, community, and biome.

It is not possible for an airborne pathogen to travel very far. TRUE OR FALSE

Speed in a given direction is called a. thrust. c. mass. b. velocity. d. acceleration.

Essay about biology On your semester in biology what was one thing that you learned and will use in your life

A solar eclipse is when the moon blocks the sun from part of the earth. true or false?