The blood group B is almost absent in Native Americans, whose ancestors arrived in very small numbers about 10,000 years ago. Which factor is responsible for this phenomenon?

What are 3 things living organisms give off

When a muscle moves, a phosphate is removed from ATP. Breaking a bond in ATP allows the chemical energy stored in the bond to disperse in a muscle cell in the forms of mechanical energy and heat energy.

Sally bought some bird seed for the birds in her backyard. She noticed that the cardinals were not eating any of the seeds she put in the bird feeder.

An estuary is ___ a. a freshwater biome b. an area with low concentration of minerals and nutrients c. characterized by deep water d. an ecotone

Predict what would happen if the cytoplasm of the cell is dysfunctional? The cell will keep doing its normal activity as long as it contains a nucleus. The cell will not be able to access chemical substances that it needs to function.

What could be the blood type of the unknown person in row one of the diagram?

Danny has taken a cross section of a seed. Which of the following are the parts that he will see? pollen grain, sperm, and egg stored food, flower, and pollen grain seed coat, stored food, and an embryo cone, zygote, and seed coat

One trait a plant can have is either red leaves or brown leaves another trait is tall stems or short stems a plant used in a dihybrid cross has the genotype rr Tt what is the phenotype of this plant

When Jacob starts running, his legs move faster and his heart rate increases. Which types of muscles are involved in these changes? A.) Skeletal muscles control his leg movement and smooth muscles control his heart rate. B.

2. According to the cladogram of primates shown, which key cultural feature was shared exclusively by only homo sapiens and Neanderthals? A. Artistic creation B. Tool building C. Walking upright D. Burying dead/religious beliefs