Image Courtesy of 3D Science.com
Based on the image above, which of the following digestive system organs performs both mechanical and chemical digestion?

Answer: Option A

Explanation:

Answer:

A.

Explanation:

Digestion begins in the mounth. Mechanical digestion is the actual chewing of the food, and the chemical digestion begins when the saliva secretes digestive enzymes.

Earth's crust is a thin layer made of
a rock
b metal
c liquid metal
d water

Someone please help me !

There are three species of birds on an island. Bird A has a heavy bill for eating seeds.
Bird B has a pointed bill for eating insects. Bird C has a sharp bill for eating both insects
and seeds. If all insects on the island suddenly disappeared, which bird or birds would
be the LEAST affected?



Please help

Which of the following contain stem cells that produce most types of blood cells?
Bone Marrow
O Muscle cells
O Bile
O Plasma

The fan illustrated here plugs into the wall and blows air to make a room cool.




Which of the following best explains how it works?
A: It reduces heat by producing sound energy.

B: It gets chemical energy from gases in the air.

C: It transform electrical energy into the energy of motion.

D: It spins, sending heat and light energy through its wires.

Hello! could someone please do a 4 sentence quark poem

A hypothetical phylogeny for marsupial relatedness is shown here. Macropodidae is the marsupial family. Which of these statements is supported by the phylogenetic tree shown here? Select ALL that apply.
A) M. bicolor and M. parma are in the same subspecies category. Eliminate
B) M. agilis and M. eugenii share the most recent common ancestor.
C) T. thetis and P. xanthpus share the most characteristics in common.
D) T. thetis and P. xanthpus share the greatest number of taxa levels than other species.
E) M. agilis and M. eugenii share the greatest number of taxa levels than other species.

What would happen if there is an obstruction in the vas deferens?​

5. Explain the process through which natural selection can lead to a new species of organism.

Which of the following is an example of cross contamination? *
1 point
cutting a tomato and lettuce on the same cutting board
cutting chicken and a tomato on the same cutting board
washing the cutting board with hot water and soap before cutting each ingredient

Rylee saw a cell under a microscope and drew what she saw. This cell is classified as —

Tell me if you think caecilians are amphibians, reptiles, or fish.

A group of students wants to study the structures of animals in the desert. One question they should ask is-
How long do the animals live?
Can you buy the animals in pet stores?
How do the animals satisfy their need for water?
How many offspring do the animals have?

need help, will mark brainliest! plsss.
Which of the following is *not* a physiological mechanism regulated by timing?

Circadian rhythms in eukaryotes
Hibernation of animals during winter
Photoperiodism to direct the flowering of plants- i think its this one
Viral reproduction in a host cell

How about decreasing the amount of water in blood affect blood pressure

Which of the following best describes the material that makes up the Earth's asthenosphere
The Layers of The Earth
A. Liquid magma
B. A rigid solid
C. A soft solid that is able to flow (convection currents)


PLEASE HELP

High blood pressure is a common and dangerous condition affecting about 75 million people in the United States. It is known as the "silent killer" because many people don't know they have it. This contributes to the disease being the second leading cause of death of Americans.

Which of the following lifestyles would increase the risk of high blood pressure?



Group of answer choices:

Living a calm sedentary lifestyle on an island that is hit by an occasional hurricane.

Losing weight after childbirth.

Attending water aerobics class 4 times a year.

Eating meals that include fruits, vegetables and grains.

Which of the following best predicts and justifies how the proportion of the Tibetan population with big blood vessels living in the mountains will change over the next 1,000 years (assuming conditions remain stable)?

Question 2 options:

I predict that the proportion of individuals with big blood vessels living in the mountains will decrease because there is a variation in blood vessel size and those with the smaller blood vessels can store more red blood cells than larger vessels, so more oxygen can be moved to the body cells. Therefore, they have a better chance of surviving and passing this trait on to their offspring.


I predict that the proportion of individuals with big blood vessels living in the mountains will stay the same because there is a variation in blood vessel size and that variation will remain in a population. The is what is so cool about humans, we are all so unique.


I predict that the proportion of individuals with big blood vessels living in the mountains will increase because there is a variation in blood vessel size and those with the bigger blood vessels can deliver more oxygen to the body cells and therefore have a better chance of surviving and passing this trait on to their offspring.


I predict that over 1,000 years, the proportion of individuals with big blood vessels living in the mountains will not change because a change can’t happen to an individual, an individual can only increase the amount of red blood cells it makes, not its blood vessels.

During fertilization, sperm cells will either contain an x or a y chromosome in addition to 22 other chromosomes, totaling______

What does "reliability" mean in these sentences?

Essay Question: Which two species are more closely related?

If you find a fossil in two different locations and it has featured in common with dinosaurs and modern birds, how does this support the evolutionary theory?

a) the two species must not be related
b) looking at the fossils, they show similarities both physically and in their DNA that don't appear to change much over time
c) dinosaurs must have evolved from mammals because their bones are similar in size rather than birds
d) the land must have been together at one point where these two species interbred to share a common ancestor

An organ that makes and secretes hormones is called a
1] lung
2]gland
3]pancreas
4]thyroid

PLZ HELP ME!!!!
2. What happens to sedimentary rocks on Earth’s surface?

At the core of the differences between gender and sex is the chromosomal information transmitted at the moment a child is conceived. An "XY" chromosome generally means A) a heterosexual embryo B) a male embryo C) a hermaphrodite embryo OD) a female embryo​

Put the following in order describing the process of using geothermal energy to create energy.
= Heat is collected from the Earth
= Steam turns a turbine.
= Generators produce electricity.
= Heat is used to change water into steam.

what is the sequence of mRNA codons that are synthesized during transcription that go with TACCGGATGCCAGATCAAATC, TACGGGGGCGTAACCACAACT and TACCTGTTAAGCTACAAAATT?

What are the goals of binomial nomenclature and systematics?

Which technique will researchers studying the inheritance patterns of various disorders most likely use? A. CLADOGRAM, B. DNA FINGERPRINTING, C. GEL ELECTROPHORESIS, D. CHROMOSOMAL ANALYSIS

HELLHELEPEGELLHELLPPPPPPPPP help please

If an acorn falls off a tree, is it living or non-living??