To pass freely through a cell membrane, a molecule must be

Where does the convection current in the mantle obtain its heat energy

Complete proteins are found primarily in vegetable sources.

Horses can have smooth hair controlled by a dominant allele or curly hair controlled by a dominant allele. A horse has the allele Ss. What is its phenotype? a) curly hair b) dominant c) smooth hair d) homozygous recessive

Horses and zebras can be bred to produce a zorse, which is sterile. Which is most likely the reason zebras and horses are considered separate species? They cannot breed. Their offspring cannot breed. They look different from each other.

Is a frog biotic? explain

Read the hypothesis below and answer the question that follows. Individuals who smoke will have a higher frequency of developing cancer later in life. Which of the following would not be a potential extraneous variable for the stated hypothesis? A.

A lucky yeast cell falls into your glass of grape juice and reproduces for 10 hours. What type of population growth would you guess this is? Question 7 options: Exponential Logistic

What is the primary form in which oxygen is carried in blood? as carbonic acid in plasma chemically bound to hemoglobin dissolved in plasma as a bicarbonate ion in plasma?

Is energy in fossil fuels is derived from the energy stored in plants and animal matter?

Bacteria on legumes are able to fix nitrogen from the air. True or false?