Which of the following involves only biotic factors?

A. a pine tree absorbing light from the Sun

B. a spider building a web in the corner of a building

C. a duck catching and eating a snail

D. an otter using a stone to break open a sea urchin

Which of the following is a secondary reinforcer? food sex a gold star water cupcake

Your friend sits down next to you at lunch with only a bottle filled with a lemonade, cayenne pepper and honey mixture. She is in her fifth week of completing this liquid-cleansing diet, and she looks pale and very weak.

How are tropical plants such as bromeliads adapted to the biome in which they live

When an offspring inherits one recessive allele and one dominant allele, what is the correct way to write the genotype?

What type of mutation occurred for mutated sequence #1 and what was the result? Substitution - -Silent mutation Addition - - Frameshift Deletion - -Missense Substitution - - Missense

The hormone that raises blood sugar levels is insulin. the hormone that raises blood sugar levels is insulin. a. True b. False

It has been decided by a group of scientific experts that lack of internal temperature regulation, presence of waterproof skin made of scales, and a waterproof egg are the three main characteristics that should be used to classify organisms as

While snorkelling you observe a brightly coloured worm-shaped animal swimming nearby. You can see that its body is segmented, and that it has many bristly appendages. It is most likely to be a member of the phylum A. Nematoda B. Arthropoda C.

Sex cells are reffered to which of the following

During the solstice the periods of light and dark are equal?