What is a sperm cell

The nuclear model explains

Growth rings are found in both plants and animals. true false

Many plants have a waxy cuticle to prevent them from losing water. This is made of A. lipids. B. nucleic acids. C. carbohydrates. D. protein.

The poison dart frog can have bright green, red, blue, or yellow skin that secretes a poisonous substance when it feels threatened. Which type of adaptation does this describe? Mimicry Warning coloration Camouflage Chemical defense

Muscles in animals are often found in pairs, because a. muscles can only pull. b. muscles need to be able to both push and pull. c. muscles can only push. d. muscles can only produce a force as they relax.

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.