The first organisms to appear on Earth did not need?

a.

oxygen.

c.

cells.

b.

nitrogen.

d.

chemicals.

Sensors in the kidneys can detect a rapid loss of fluid after which of the following occurs? A. low levels of antidiuretic hormone in the blood B. low levels of aldosterone C. increase in thirst D. drop in blood pressure

This kind of has to do with education I'm curious: Could I be suffering from any mental illness of the emotion? I will be really happy, hear something I don't want to hear and then go ballistic.

How are molecules and energy changed during the biochemical processes of cellular respiration?

What is a failure to maintain homeostasis called

Which is an example of genetic diversity within a rain forest? Question 15 options: all of the genes found within the ecosystem DNA of a single three-toed sloth many variations of jaguar spots wide variety of beetle species

What will the majority of pathogens in food be killed by? a) antimicrobial secretions from the sebaceous glands in the skin b) mucus in the trachea c) acid in the stomach d) nose hairs

What can high levels of salt do to a plant

What is the composition of earths inner and outer core?

Which is a gamete? A. testis B. steroid C. sperm D. progesterone

A solution should b___ in order to prevent water gain or water loss in a cell