Is there any animal (s) that are unnecessary in the natural world a. k. a our planet, Earth?

Why it is important that reflexes happen without thinking about them

Can choose two of her three pairs of sneakers to take to a track meet. If the pairs of sneakers are called A, B, and C, which choice represents the sample space, S, for the event?

Males of many marsupial species have forked penises that are incompatible with the anatomy of female placental mammals. What type of isolating mechanism does this represent?

Crossing over often occurs during prophase. How could scientists use an easy to measure trait that is linked to the gene responsible for a certain genetic condition to locate the disease causing gene?

Which of the following is defined as the location and density of a population in an area? A.) Composition B.) Distribution C.) Dynamics D.) Migration

Photoperiodism and flowering use the data in the table below to determine whether each plant is a short-day plant, a long-day plant, a day-neutral plant, or a plant that cannot be classified based on the data. description plant a plant b

The alkali metals make up which group of the periodic table?

What is the most important mechanism through which combined oral contraceptives prevent pregnancy?

You are making CO2 production measurements on hovering hummingbirds in Peru and assume they have fed on floral nectar recently (glucose), but in fact, they have not fed in the last hour and are metabolizing fat;

C. Which specific biomolecule (lipid, protein, nucleic acid, carbohydrate) is each food mostly made of?