All categories

3 years ago

Where is the squid shell found and what is it called

Biology

1 answer:

Elodia [21]3 years ago

3 0

Answer:

It is called pen and it is located at the dorsal side

Explanation:

Squid belongs to the class Cephalopoda, subclass Coleoidea which is characterized by internal shell (unlike subclass Nautiloidea in which shell is located externally).

The shell of the squid (the pen) in very reduced and small, formed from chitin and located at the dorsal side. The pen provides attachment for muscles and it gives the squid stiffness.

Most likely, this internal shell evolved from the external shell, because it is believed the ancestral of the organisms from the Coleoidea was probably nautiloid-like.

You might be interested in

Nuthatches and brown creepers are birds which eat insects that hide in the furrows of bark in hardwood trees. The creeper search

jeka94

Answer:

This are our options to complete the question

-bottom-up and top-down hypotheses

-competitive exclusion

-keystone species

-resource partitioning

-character displacement

The CORRECT ANSWER IS resource partitioning.

Explanation:

Resource partitioning is the division of certain limited resources by species to eliminate competition in an ecological niche in order to allow easy coexisting with one another

The creeper searches for insects by hunting from the bottom of the tree trunk to the top, whereas the nuthatch searches from the top of the trunk down to eliminate competition and allow for peaceful coexisting between them

5 0

3 years ago

the endoplasmic reticulum (er) serves as a the endoplasmic reticulum (er) serves as a protein shuffle transpiration area transpo

lutik1710 [3]

Endoplasmic reticulum serves as transpiration area. The correct option is B.

<h3>What is endoplasmic reticulum?</h3>

The endoplasmic reticulum (ER) is a large, dynamic structure in the cell that performs numerous functions such as calcium storage, protein synthesis, and lipid metabolism.

The ER's various functions are carried out by distinct domains, which include tubules, sheets, and the nuclear envelope.

The endoplasmic reticulum can be smooth or rough, and its function is generally to produce proteins that allow the rest of the cell to function.

Ribosomes, which are small, round organelles that make proteins, are found in the rough endoplasmic reticulum.

Thus, the correct option is B.

For more details regarding endoplasmic reticulum, visit:

brainly.com/question/13118914

#SPJ4

3 0

1 year ago

Please help me wuth this:

ipn [44]

1. Answer;

It facilitates the movement of the fetus towards the pelvic girdle thus the child is born headfirst.

Explanation:

During labor the pelvic floor facilitates movement of the fetus towards the pelvic girdle by resisting the descent of the presenting part. This makes the fetus to rotate forwards and therefore results in majority of the fetus being born headfirst.

2. Answer;

Purple pushing lead to development of pelvic floor problems.

Explanation

;

Purple pushing involves the midwife instructing a woman to hold her breath for ten seconds while forcefully pushing down during a contraction.
in the second stage instead of waiting for the mother to feel the instant urge of pushing which lead to development of pelvic floor problems.

3. Answer;

Exercise can help to strengthen the abdominal muscles and reduce the appearance of diastasis recti.

Explanation;

By contracting transversal abs muscles they strengthen and pull the muscles inwards.
The diastasis recti reduce with time due since the rectus muscles come close to each other enabling a human being to live a normal life because flexion, bending and stability becomes easy.

4. <u>Answer</u>

Pelvic floor muscles
Stomach muscles
Abdominal muscles
Perineal muscles
Uterine muscles

<u>Explanation</u>

Abdominal muscles are stretched to their limit by term. They greatly decrease the ability to perform strong contraction.
Pelvic floor is vulnerable to muscular and neurological injury during labor and delivery.
Perineal muscle tightening strengthens the pubococcygeus muscle and increases its tone.

5. Answer and explanation;

Sports that can lead to falling down e.g. skating
Sports that may involve altitude change
Exercises that involve lying flat on your back
Exercises that involve holding o breath
Motionless standing

6. Answer

Yes

Explanation

;

Exercise maintains physical fitness, health and wellness aiding growth to the unborn since the mother gains enough strength and energy and there is proper blood flow.
Many pregnant women tend to gain weight which may lead to health difficulties for example struggling to breath. The pregnant lady is able to cope with labor and she is able to get back in shape after the baby is born.

7. <u>Answer</u>;

One is supposed to get up slowly and gradually to avoid dizziness.

<u>Explanation;</u>

Dizziness happens after a tiresome activity done continuously for a period of time thus one should get up slowly and gradually to avoid other injuries like falling endangering the life of the unborn child.

7 0

3 years ago

An allele whose trait is masked (weaker) in the presence of a stronger allele

labwork [276]

Answer:

There are 2 alleles, a recessive allele and a dominant allele. The weaker allele is the recessive allele.

5 0

3 years ago

Read 2 more answers

A total of _____ amino acids compose the majority of protein in living things and nine are _____ to human

Delicious77 [7]

Most proteins in living organisms are composed of 40 amino acid residues in total, and nine of those are crucial for human health.

Which majority of amino acids make up proteins in living things?

Only twenty different amino acids, each with a distinct side chain, make up proteins. Different chemistries can be found in the side chains of amino acids. The majority of amino acids contain side chains that are nonpolar.

There are nine essential amino acids:

tryptophan
valine
isoleucine
leucine
lysine
methionine
phenylalanine
threonine
methionine

What Constitutes Proteins?

Amino acids are the basic units of proteins. They are tiny chemical compounds with an alpha (central) carbon coupled to an amino group, a carboxylic acid group, hydrogens, and a changeable element known as a side chain.
A protein is made up of a lengthy chain of amino acids that are connected by peptide bonds. The biological process that links the carboxyl unit of one amino acid towards the amino group of a nearby amino acid results in the extraction of a water molecule, forming peptide bonds. The main structure of a protein is thought to be its linear amino acid sequence.

Learn more about amino acids here:

brainly.com/question/11843803

#SPJ4

8 0

1 year ago