The age of the universe is measured in 10 to 20

Answers

Answer 1
Answer: 4.6 or 4.7 billion years

Related Questions

What structure prevents food and liquids from entering the trachea? what structure prevents food and liquids from entering the trachea? glottis larynx vestibular folds epiglottis?
What is the definition of genes?
True or false? The two chambers at the bottom of your heart are called ventricles.
What two behaviors that allow organisms that stay in Masssachusetts all year to survive seasonal changes?
Many new groups of organisms evolved in a relatively short time in an event called the _____.

The body's ability to maintain a relatively constant internal environment is called homeostasis. This stability can be challenged by:(Select all that apply)
A. reduced water or food intake
B. infectious organisms
C. elevated or depressed blood pH
D. extreme temperatures.

Answers

Homeostasis is the body's ability to maintain a constant internal environment. This stability can be challenged by reduced water and food intake and an elevated or depressed blood pH.

Final answer:

Homeostasis, the body's ability to maintain internal balance, can be challenged by reduced food or water intake, infectious organisms, changes in blood pH, and extreme temperatures. These challenges can disrupt the body's normal functions and cause varying health impacts.

Explanation:

The body's ability to maintain a relatively constant internal environment, called homeostasis, can indeed be challenged by various factors. Reduced water or food intake can alter the balance of nutrients and hydration in the body, potentially leading to dehydration or malnutrition. Similarly, infectious organisms such as bacteria, viruses, or parasites can disrupt homeostasis by causing disease.

Elevated or depressed blood pH, which refers to the acidity or alkalinity of the blood, can disrupt bodily functions if it falls outside of a certain range. Finally, extreme temperatures can challenge body's ability to regulate its own temperature, potentially leading to conditions like hypothermia or heat stroke.

Learn more about Challenges to Homeostasis here:

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The earliest forms of life on earth were photosynthesis? True or false

Answers

Answer:

False

Explanation:

The first living thing on planet earth was a single celled species commonly termed as prokaryotic. These simplest forms of species were made up of primordial chemicals which some how under specific environmental condition developed into proteins and RNAs thereby generating higher forms of life. The earliest form of single celled prokaryotes  were termed as bacteria and archae. These tiny creature were observed for the first time some 4 billion years ago.

The earliest forms of life on earth were photosynthesis?  Its False.  

According to the current theory, the Earth's moon was formed __________.a.
together with Earth
c.
from a portion of Earth
b.
separately from Earth
d.
from a leftover star

Answers

Answer: together with earth.

How does human evolution or natural selection relate to the susceptibility of disease?

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The threat of disease is one of the reasons why Humans evolve. The disease kills the weaker people and some evolve to be immune; and they survive.

Enzymes and antibodies have different functions, but both are types of ____________.lipids
proteins
carbohydrates
NextReset

Answers

Enzymes and antibodies are functional proteins. the second one is the answer

In vertebrates, chemical messengers called hormones are secreted by the _____ system. endocrine excretory hormonal pituitary

Answers

The correct answer should be the endocrine system.

Hormones are secreted by endocrine glands in endocrine systems. Opposite of this would be the exocrine system consisting of exocrine glands.

The correct answer is endocrine system.

Endocrine system in vertebrates consists of endocrine glands. Endocrine glands do not have ducts thus, they are also called as ductless glands. The glands which secretes enzymes are glands with duct, called exocrine glands.    Therefore, the hormones secreted from endocrine glands are directly poured into the blood for the action on target organs. Examples of endocrine glands are pituitary gland, thyroid gland, adrenal gland.