If a cell has four chromosomes how many copies of the genetic material are there in each chromosome?

Give 2 examples of a physical response to an enviromental change that would enable an organism to maintain homeostasis

What skill is a scientist using when she listens to sounds that a whale makes? A. Making a hypothesis B. Interpreting data C. Drawing conclusions D. Making observations

Which would last longer, the engraving in a headstone made of marble

He birds shown above have beaks with three different shapes and sizes. these genetic variations in the black each appeared initially due to? - environmental factors - mutations - natural disaster - conscious choice by the birds

Why was it important for mendel to study such a large sample of pea plants to determine the probability of inheritance?

Oceanic crust is composed mainly of basalt. continental crust is composed mainly of granite. why does oceanic crust generally tend to subduct under continental crust when plates collide

What is placebo and why is it used in some experiments

What is organ? a. group of different types of tissue that work together to perform a specific function or related functions. b. group of cells that work together to perform a similar function. c.

The temperate phage lambda can undergo two life cycles depending on the environmental cues. During which cycle does phage lambda form a prophage? Choose one: A. lysogeny B. burst cycle C. lytic cycle D. slow-release cycle

Which blood components work together to form a blood clot