1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mart [117]
3 years ago
9

What is the medullary index for an organism that has a medulla width of 2cm and hair shaft width 4cm? Is this organism human or

animal?
Biology
1 answer:
navik [9.2K]3 years ago
4 0

Answer:

a. 1/2 b. The organism is an animal

Explanation:

a. What is the medullary index for an organism that has a medulla width of 2cm and hair shaft width 4cm?

Medullary index = diameter of medulla/diameter of hair.

Given that diameter of medulla = medulla width = 2cm and diameter of hair = hair shaft width = 4cm,

Medullary index = diameter of medulla/diameter of hair = 2 cm/4cm = 1/2

b. Is this organism human or animal?

Since the medullary index = 1/2 > 1/3 (if it is ≤ 1/3 it is human hair and ≥ 1/2 it is animal hair), it is animal hair. So, the organism is an animal.

You might be interested in
Dr. hakim is interested in studying aggression through researching how the structure and function of genes interact with our env
Andre45 [30]

Behavioural genetics is the study of the effects of genes as well as well the environment on the behaviour of the individuals. The scientists who study the Behavioural genetics are known as behavioural geneticists.

In this case Dr. Hakim is studying the influence of genes and the environment on the aggression, which is a kind of behaviour. Hence, Dr. Hakim is a  behavioural geneticists, and he works in in the field of behavioural genetics.

3 0
3 years ago
What property of membranes allows interactions to take place within the membrane, including the assembly of membrane protein clu
Greeley [361]

Answer:

Phospholipid bilayer.

Explanation:

The plasma membrane (also known as the cell membrane or cytoplasmic membrane) is defined as a biological membrane that separates the interiors of a cell from its external environment.

The plasma membrane has a function that protects the cell from its external environment, mediates cellular transport, and transmits cellular signals.

It is composed of a lipids bilayer (phospholipids and cholesterol), (phospholipid is a lipid made of glycerol, two fatty acid tails, and a phosphate-linked head group) with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules which hence, regulates the movement of substances in and out of cells. Plasma membranes is very flexible in order to allow cells change form example, red blood cells change shape as they pass through narrow capillaries.

5 0
3 years ago
Common ancestors only exist within a single species.
puteri [66]

<u>Answer:</u>

<em>It is not true to say that common ancestors occurs only within a single species rather two species with similar traits might have a common ancestor. </em>

<u>Explanation:</u>

If the ancestor is same for both the species then it is said that both the species are closely related and share common ancestor with similar evolutionary relationship.

Phylogenetic tree are drawn and studies are done to understand the ancestor of a species. The evolution has occurred from the ancestor to the new species formed.

6 0
3 years ago
What is the most important similarity between sumer and babylon?
Gala2k [10]
An area in the South region Babylonian in present - day Iraq
The chief City of ancient Mesopotamia and capital of the ancient kingdom of Babylonia
5 0
3 years ago
4. A sample of DNA from a human skin cell contains
Serhud [2]
A ) if it s dna G with C and A with T so if it s C 32 G its 32 you have only 100% so it should be 100-32-32 =36 A=T so 36=A+T 64=2T T =18
6 0
3 years ago
Other questions:
  • Which type of transformation uses a scale factor?
    10·2 answers
  • Identify the types of point mutations depicted
    11·1 answer
  • Which of the following describes the frequency, graphed as a valued of a population, which results as a bell-shaped curve?
    13·1 answer
  • The correct order of the movement food chain
    15·1 answer
  • When the play begins, Tom is dressed in a merchant sailor uniform, foreshadowing _____.
    5·1 answer
  • if a gene has completely dominat allele and two recessive alleles how ñmany difcerent traits can these allele produce
    13·1 answer
  • DNA contains all of the genetic information for a cell andis often alled the
    13·1 answer
  • Which organism is the primary producer<br> 1)Grass<br> 2)mushroom<br> 3)snake<br> 4)eagle
    10·2 answers
  • Which cell structure would you find in a bacteria?
    11·1 answer
  • a surfer experienced a windy day at the sea, he counted the waves passing by him per min. he counted 20 waves in one minute. can
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!