How do scientists use the fossil record?

Megan observes four cells under a microscope and makes sketches of them as shown. Identify whether the cells are prokaryotic or eukaryotic TILES: - prokaryotic cells - eukaryotic cells

How does a vaccine use antigens to aid the immune system

Which change in DNA will cause a heritable germline mutation? A. The sugar phosphate backbone of DNA in bone cells breaks due to exposure to X-rays. B. Thymine dimers form in the DNA of a skin cell due to exposure to UV light. C.

A gene for corn has two alleles, one for yellow kernels and one for white kernels. A farmer mates yellow and white corn. All of the offspring have a nearly even mix of yellow and white kernels.

If you had a genotype of 'tt', what would your phenotype be? Short Tall

What are the 3 care instructions for future life on earth

If many trees are removed from a forest by logging, what is themost immediate effect on the carbon cycle in that forest? A. increased rates of decomposition B. decreased rate of atmospheric CO2 C. decreased combustion of fossil fuels D.

How many of Earth's plant species are used as agricultural crops? A) 1,000 B) 3,000 C) 5,000 D) 7,000 E) 9,000

Dendrites are branching cytoplasmic projections of neurons that receive impulses and transmit them to the cell body. a. True b. False

What is the difference between a reactant and a product?