Open with
A
Life Spans of Human Cells
Life Spans of Various Human Cells
Like all organisms, cells have a given life span from
Cell Type Life Span Cell Division
birth to death. In multicellular organisms, such as
humans, the health of the organism depends on cells
Lining of esophagus 2-3 days
Can divide
not exceeding their life span. This is especially true
Lining of small intestine 1-2 days Can divide
of cells that tend to divide rapidly. If these cells did
Lining of large intestine 6 days Can divide
not die on schedule, overcrowding of cells would Red blood cells Less than
occur, causing uncontrolled growth that would be
Cannot divide
120 days
life-threatening.
The data table shows the life spans of various
White blood cells 10 hours Cannot divide
to decades
human cells. It also contains information about the
ability of the cells to multiply through cell division.
Smooth muscle Long-lived Can divide
1. Inferring White blood cells help protect the body Cardiac (heart) muscle Long-lived Cannot divide
from infection and disease-producing organisms.
Skeletal muscle
Long-lived Cannot divide
How might their function relate to their life span?
Neuron (nerve cell) Long-lived Most do not
2. Comparing and Contrasting Based on the
divide
data, how are the consequences of injuries to the
heart and spinal cord similar to each other? How
are they different from the consequences of injuries 4. Going Further Cancer is a disease related to ced
life span and cell division. If cancer cells were
to smooth muscle?
added to the data table, predict what would be
written under the columns headed "Life Span" and
3. Formulating Hypotheses Propose a hypothesis
"Cell Division." Explain the reasoning underlying
to account for the data related to the cell life spans
your predictions
of the lining of the esophagus, small intestine, and
large intestine.

Answer:

if you look the page and textbook up itll give you all the answers

Since the initial emergence of human immunodeficiency virus (HIV), this disease has spread across the world. This type of spread is known as a

Farmers prefer to plant crops in soil that is rich in nutrients. Which of these soil types would MOST LIKELY contain the most nutrients?

soil that has many large rock particles in it

soil that allows water to drain very easily through it

soil with a bedrock that is very close to the surface

soil with a lot of decomposed organic material in it

In the diagram below, which cells are involved in the process of reproduction?
a. cell 3, only
b. cells 2 and 3
c. cells 1 and 2
d. cell 1, only

Why is ATP so useful for cellular energy

Select all that apply !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Which of the following can occur during an earthquake? Select all that apply.


Cliffs and cracks form

Sections of the crust are demolished into clouds of dust

Part of the crust may sink under the ocean

Crust can fold or wrinkle

Obese humans probably have high levels of leptin because

Both the hair and skin contain keratin. When comparing the hair shaft to the skin which layer of the epidermis is most similar?
•Basal limina
•Stratum basale
•Stratum corneum
•Melanocytes

Miranda is investigating the concept of gravity. She dropped a flat sheet of paper and a sheet of paper crumpled into a ball from the same height. She
repeated the procedure from various heights.
For every trial, the paper ball hit the floor in less time than the flat sheet of paper. Why did the paper ball always fall faster?
A. Gravity is stronger for the paper ball.
B. Air can get trapped in the paper ball.
C. There is no friction for a ball-shaped object.
D. The flat sheet was affected more by friction.

HELP!!!

Look at the diagrams below. Which diagram shows the proper relationship between
the biosphere and an ecosystem? (A) Drawing A (B) Drawing B (C) Drawing C

please help me 20 points !!the answers choices are

a- insertion
b-deletion
c- both insertion and deletion
d-impossible to determine

If you are a candidate for presidential election and you are interviewed in a talk show, how will you answer this question by the host, What will be the first policy that you implement if you will win that would help improve the state of science and technology in the country?​

Which of the following are reliable measurements of water quality that can be tested?
Check all that are true.

a.turbidity level

b.microbial load

c.appearance of water

d.pH level

Which continent reports the greatest number of edible species? ____________________________

5. Which of the following is incorrect combination of disaccharide sugar? A. Maltose glucose + glucose B.Sucrose galactose + fructose C. Lactose glucose + galactose D. Non​

NO LINKS OR FILES REAL ANSWER draw a diagram of water crossing a membrane by osmosis

What combines in different
ways to make up all matter?
1.

In the rock pocket mouse example, after the lava flow made the ground dark.
The darker fur color in some mutated mice became:
O A favorable trait
O Lighter
O A neutral trait
O A negative trait

What are the two branches of the somatic nervous system?

Science is based on "natural" causes and effects. What does "natural"
mean in this context?
O Phenomena that can be reliably observed with senses or instruments; NOT
supernatural.
O Phenomena that occur on their own without being manipulated; NOT
controlled.
O Phenomena that occur without the direct participation of humans; NOT
artificial.

PLEASE HELP ASAP THIS IS OVERDUE BIOLOGY HOMEWORK
First, ____ unzips the strands. Next,
___ __________ reads the strands and fills
in the missing bases on both sides.
The ________ strand is completed
continuously, while the _______ strand is
completed in sections.
When this process is completed, 2 identical DNA strands are produced.
Each with an _____ side and a
________ side.

The row of energy in a grassland ecosystem is shown
Hognose snake
Owl
Toad
Spider
Rabbit
Sparrow
Cricket
Grass
Mouse
Based on the diagram, which two populations best represent trophic levels that receive the
LEAST amount of the total energy provided to the ecosystem by the grass?
A Crickets and sparrows
B
Toads and spiders
C Rabbits and mice
D
Hognose snakes and owls

Which of the following is a BEHAVIORAL adaptation?
Sleeping during the day
O Large ears
Camouflage
O Seed production

Which of the following descriptions about electrons is correct?
Electrons are located in nucleus
O Electrons are positively charged
The number of electrons in an neutral atom equals to the number of protons in the nucleus
O All electrons in a carbon atom are at the same distance to the nucleus, thus they form a single layer of electron shell

Is enzyme activity a form of cell regulation

Which of the following protects the skin against infection by microbes? (Select all that apply)
Antimicrobial peptides
Nerve endings
Dryness
Vitamin D
Acid mantle

The becomes the seed, while the ovary becomes the fruit,
after fertilization.

What is the chromosome type in interphase? And what is the happening during that phase?

What role have plate tectonics played in the formation of the earth's surface?

PLZ HELP DUE IN 30 MINS
1) Why is having no leaves a good adaptation for plants found in the desert?

2) What is the evolutionary significance of developing pouches? (What makes a pouch a good adaptation?)​

Q16.A needle can be made to "float" on the surface tension of water. What causes this surface tension to form?

Select one:
a. The ability of water to regulate temperature
b. The cohesion of water molecules to each other
c. The ability of water to act as a solvent
d. None of the above X