Which of the following is a theory for the dinosaur extinction?

1. Dinosaurs were allergic to pollen

2. Increased Radiation Levels

3. Diseases From Other Animals

4. All Of Above

Why would it be necessary for a leaf cell to have lots of chloroplasts? A To convert light energy into carbohydrates B To provide energy for movement C To store water and nutrients D To make proteins

Which of the following is not used to collect data? pseudoscience surveys models observational studies

Dorothy works at a life science laboratory where she conducts research on the development and physiology of plants and fruits. Dorothy is exposed to which type of hazard

Ocean trenches are formed when A) two oceanic plates slide past each other. B) an oceanic plate goes under another oceanic plate. C) two oceanic plates grind past each other along transform faults.

What is one of the better ways to identify most minerals? A) looking at the colour B) checking for magnetism C) determining if it's radioactive D) using the mohs scale of hardness

Melting snow, rain, and storms can all lead to which event?

If an organisim has 32 chromosomes in its skin cells, how many chromosomes will be in its gamtes following meiosis?

Which feature is common to prokaryotic and eukaryotic cells? organelles cell nuclei complex structures cell membranes

State one possible negative impact of importing a natural predator to control a pest.

What does dr. carroll mean when he says, "while mutation is random, natural selection is not"?