Which geological time boundary marked extinction of dinosaurs

if research is restricted then the new discoveries made are limited which action is most likely to decrease the number of discoveries scientists can make

How many species are we losing every hour?

A woman gave birth to a child with a bent vertebral column. Which is a possible reason? The mesoderm layer may have developed abnormally. The ectoderm layer may have developed abnormally. The endoderm layer may have developed abnormally.

One function of a plant's seed is to (1) perform photosynthesis (2) provide food for early development (3) decompose dead organisms or (4) reproduce sexually?

What happens to most energy at each trophic level?

NASA has published a list of criteria for identifying fossil bacteria in samples from Mars, as part of a search for evidence of life. Which of the following is good evidence for the presence of bacterial cells? a. The cell size of 0.5 to 2 microns b.

How much rain does a dessert get each year?

Select the correct answer. in a family, the father is affected by a genetic disorder. The son in the family has the same disease, but the daughters do not have it. What type of inheritance is this? A. Y-linked B. X-linked C. Polygenic D. Codominant

Which of these is a heterozygous genotype? Select one: a. Tt b. TT c. ta d. tt

What is the final outcome of meiosis