Which organism has a nerve net that allows it to respond to a stimulus in a coordinated way?

clam

earthworm

hydra

shark

Which group of animals only use internal fertilization?

Two types of behavioral adaptations are ... learned and structural learned and innate structural and innate inherited and structural Which is a behavioral adaptation of birds?

What is the best definition of a population

Collecting research data is the final step in the scientific method. true or false

Why would a tumor on the pituitary gland affect the thyroid gland and also tims levels of testosterone

Which of the following is a part of the digestive system? Capillary Diaphragm Ovary Saliva

An important characteristic of animals is that all of their cells works the same way, they do not have any specialization. True or False?

When a muscle is unable to respond to stimuli temporarily, it is in which of the following periods? A) latent periodB) fatigue periodC) relaxation periodD) refractory period

Evan and his friends are so surprised to find deer in their subdivision! His mom is getting mad because every morning they are in the garden eating everything they see.

HURRY! Which best describes the structure of the molecules that make up proteins? O A. Carbon + hydrogen + oxygen B. Phosphate + sugar ring + nucleotide base O C. Hemoglobin + oxygen + iron O D. Carboxyl group + amino group + side chain