Before Darwin published his work, Lamarck and others had suggested mechanisms for evolution. By what means did Darwin propose species evolved over time?

I have a simple question about external variables. If I'm doing an egg drop experiment, and my teacher "chucks" it off of the roof in any way she feels like it, would that count as an external or independent variable?

Which of the following is NOT a biological advantage of enzyme cascades? A. the ability to respond rapidly to a stimulus B. the ability to amplify a signal greatly C. the ability of a reaction or process to respond to widely different stimuli D.

Let's suppose a sheep that provided the oocyte for reproductive cloning was homozygous for a gene that causes a small head. This gene follows a maternal effect pattern of inheritance.

All cells have the same genetic information, but do not express the same genes. How is this possible? a. The differences are due to gene expression, which can be turned on and off. b.

Which parent do sons inherit recessive, sex linked traits from? Mother or father?

Which occurs during translation but not during transcription? C a). A DNA template is used to create an mRNA strand. b). A tRNA template is used to create a DNA strand. c). A tRNA template is used to create an mRNA strand. d).

Wheelchair athletes can have difficulty retaining body heat when the temperature drops to approximately

What do sperm cells look like

What is an acid? Select all that apply. A substance that releases hydroxide ions in water A substance that releases hydrogen ions in water A substance that tastes sour A substance with a pH below 7 A substance that tastes bitter

Skin color is determined by three to five gene pairs. This makes skin color