What is the top most layer of earth that is extremely dense and only somewhat thick

Vertebrates share many physical characteristics. All vertebrates A. have an internal skeleton that includes a backbone or spinal column. B. have a thick exoskeleton but not an internal skeleton C. have neither an exoskeleton nor an internal skeleton.

Which lobe of the cerebral cortex is most directly involved in vision?

A student is studying a cell going through the cell cycle. At the beginning of interphase, the cell has 12 chromosomes. How many chromosomes will each new daughter cell have after cellular division? A. 4 B. 6 C. 12 D. 24

Which of these best explains why Earth's inner core is a solid? A) Low pressure due to other layers forces the particles to stay closer. B) High pressure due to other layers forces the particles to stay closer.

Three months after fertilization and development of a placenta around the developing fetus, the corpus luteum regresses and forms the

An arterial condition in which there is thickening, hardening, and loss of elasticity of the walls of arteries-resulting in decreased blood supply-especially to the lower extremities and cerebrum is known as hardening of the arteries

Which parts of a cell are made of molecules?

Which one of the following statements about the troposphere is true? Select one: a. The troposphere is the atmospheric layer farthest from the earth's surface. b. The tropospheric gases move because of convection currents. c.

10. In which organelle must DNA replication occur? * O cell membrane Cell Wall O Ribosome O Nucleus

What allele is expressed as a phenotype only when two copies are present in the genotype? A. Dominant allele B. Recessive allele