Which is more likely to be the cause of down syndrome the egg or the sperm

Define living and non-living resources in the marine environment

Which structure evolved in cells approximately one billion years ago that allowed for the forming of more complex, multicellular organisms? A) nucleus B) ribosome C) plasma membrane D) golgi apparatus

Which feature of a holocrine gland will distinguish it from merocrine and apocrine glands?

The body temperature of some birds may vary as much as 13 degrees F within a 24. hour period. true or false

Regarding apoptosis all the is true except? 1-is programmed cell death 2 - can effects single cell or small cells 3 - could be pathological or physiological 4 - is associated with inflammatory reaction 5 - is mediated by enzymes known as caspses

What is alwasy true about a binary bond

Which of these examples demonstrates metabolism? A. A person eats a large dinner for digestion and energy. B. A human's skin has the ability to tan in the sun. C. A person puts on socks because his feet are cold. D.

What structure in the fetal heart allows for mixing of blood between the two atria?

Which of the following is a constructive process? deposition detachment transport plucking

Coal deposits were formed from? A. Plant life in ancient B. Ancient plankton and marine life C. Freshwater organisms from the last 100,000 years D. Modern plants and animals