When was a control used in the investigation of the amphipods and sea butterflies? Why was a control necessary?​

Answers

Answer 1

pteropods or sea snails, also called sea angels, produce chemical deterrents to ward off predators, and some species of amphipods take advantage of this by carrying pteropods piggyback to gain protection from their voracious predators.

Why was progress in science interrupted during the dark ages? The Roman Empire fell in the 5th century thus advancements in science came to a halt. As science halted in Europe, where else did it advance? Science advanced in other areas of the world like China, Polynesia, and Arab nations.


Related Questions

how does the mitochondria produce energy for the cell

Answers

Mitochondria, using oxygen available within the cell convert chemical energy from food in the cell to energy in a form usable to the host cell.

Most plants and animals in the world reproduce by sexual reproduction. Which process is responsible for the genetic variation found in organisms that reproduce this way?

Answers

Heyyy
I guess the answer would be because of meiosis in meiosis this is because in prophase the two chromosomes cross over and the genes are mixed leading a random mix of characteristics. Mutations can also cause these differences so the offspring are different and not the exact copy as parents.

I hope this helps ❤️

What is a Objective Summary on Global Warming?

Answers

Answer:

Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.

Explanation:

Answer:

The study, published last month in the journal Geophysical Research Letters, found that climate change is making summers hotter and longer, while shrinking the three other seasons. ... They found that over the nearly 60-year period, summers grew from an average of 78 to 95 days long

The periosteum and the endosteum are both membranes.
a.
True
b. False

Answers

True bc I looked it up

Question 4

For which type of anemia would getting a family health history be most important?


a. iron deficiency

b. sickle cell anemia

c. normocytic anemia

d. megaloblastic anemia

Answers

Answer:

Sickle cell anaemia is what I think is the answer

In what layer of the atmosphere is weather occuring and the layer where we live?

Answers

Answer:

Atmosphere takes place in the stratosphere and we live in troposphere

The layer where the weather occurs and where we live is called the Troposphere layer.

mark me brianliest if i helped :)

3. What effect does hydrostatic equilibrium have on a solar system body?
It gives the body's orbit a circular shape.
It gives the body's orbit a clear path.
It gives the body a potato-like shape.
It gives the body a spherical shape.

Answers

Answer:

it's option d) It gives the body a spherical shape.

The effect of hydrostatic equilibrium on a solar system body is that It gives the body a spherical shape.

What is hydrostatic equilibrium?

Hydrostatic equilibrium describes liquid or fluid at rest.

A body of solar system such as Earth has a spherical shape which is not perfect. This spherical shape of Earth and other bodies of the solar system such as;

Mars, Venus, Jupiter, Uranus etc are caused by the hydrostatic equilibrium.

Thus, we can conclude that, the effect of hydrostatic equilibrium on a solar system body is that It gives the body a spherical shape.

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if you found a vertebrate skull in the woods and the teeth were sharp and scissor-like, what type of food would you expect this animal to eat?

Answers

Answer:

meat, or flesh.

Explanation:

sharp and scissor-like teeth are used to slice through bone and muscle, while flat-topped teeth are used for vegetables. this animal is a carnivore or an omnivore.

Sharp and scissor-like teeth are used to slice through bone and muscle, while flat-topped teeth are used for vegetables. This animal is a carnivore or an omnivore.

What are the characteristics of carnivores?

A carnivore, or meat-eater, is an animal or plant whose food and energy requirements derive from animal tissues whether through hunting or scavenging.

Big carnivores include lions, tigers, and wolves. Some birds such as hawks and eagles are also carnivores. Snakes are usually carnivores as well. Small carnivores include frogs, birds such as robins, and spiders.

A carnivore is an organism that mostly eats meat, or the flesh of animals. Sometimes carnivores are called predators. Organisms that carnivores hunt are called prey.

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Select ALL the correct arswers.
Which statements correctly describe mutations in gametes and mutations in somatic cells?
Mutations to somatic cells are only present in the type of cell in which the mutation occurred.
Mutations to gametes are more likely to be beneficial than mutations to somatic cells.
Mutations to somatic cells will be inherited by an organism's offspring.
Mutations to gametes can be passed on to an organism's offspring
O Mutations to gametes do not involve changes in the DNA.
Mutations to somatic cells are transferred to daughter cells.

Answers

Answer:mutations to gametes can be passed on to an organism's offspring and mutations to somatic cells are only present in the type of cell in which the mutation occurred.

Explanation:The mutation in the somatic cells is known as somatic mutations. As they do not take place in the cells, which give rise to gametes, thus, the mutation is not inherited to the next generation by the sexual means.  

On the other hand, the genetic mutations take place in the germline cells, that is, egg and sperm, because of this the mutations possesses the tendency to get passed on from one generation to another.  

Thus, mutations are only passed on to offspring when they take place in germ cell DNA. The other kind of cells, the somatic cells refers to the rest of the cells in the body and mutations, which takes place in these cells do not get inherited further to the offspring.  

Hence, the correct statements are

PLEASE HELP WILL MAKE MOST BRAINLIEST IF POSSIBLE LOOK AT PICTURE

Answers

Answer:

CFC, water vaper, methane,  carbon dioxide

Explanation:


1. A hedgehog lives in a backyard in England. Every night, the house
owner puts out a bowl of canned cat food and hard-boiled egg. The hungry
hedgehog eats some of the food, then stops when it is no longer hungry. This
pattern helps the hedgehog to maintain a steady energy level and weight. What is
the name for keeping a stable internal environment despite changes in the
outside environment?
A. hormonal control
B. stimulus and response
C. balance
D. homeostastis

Answers

D. Homeostasis is the internal control

Answer:  D. homeostastis

HELPPP
Which of these is not associated with expiration?
A. high pressure

B. relaxed diaphragm

C. increased volume

both B and C answers

Answers

Answer:

(A)

Explanation:

High pressure has nothing to do with expiration(breathing out).

Hope it helps :)

#7#9#10
PLEASEEE
Needed by tonight

Answers

Answer:

Explanation:75

Is it possible for a primary consumer to be an omnivore or carnivore?

Answers

Answer:

yes is it

Primary consumers are animals that eat primary producers; they are also called herbivores (plant-eaters). Secondary consumers eat primary consumers. They are carnivores (meat-eaters) and omnivores (animals that eat both animals and plants).

Hope this helps!!

Explanation:

Itz Deepika Here to help ~ .

Note:- If you have any more questions then let me know !!

when a cell is in anaphase what happens to the dna?

Answers

Answer:

During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle.Explanation:

Which of the statements agrees with the base pairing rules in a DNA strands

Answers

Answer:

the offspring of two parents will have 50 percent of his or her gene's from their mother and the other 50 from their father and the gene's will determine what the child will have like the eye color and hair color shape of their nose and other things that are inherited

Explanation:

Transcribe this section of DNA.
TAC-GGA-TTT-AAA-ACG-ATC
DALA


HELP PLEASE!!!

Answers

Answer is: ATG- CCT- AAA- TTT- TGC- TAG
When transcribing DNA you only use letters A, T, C, G. A always pairs with T and G always pairs with C. If they are the opposite T will pair with A and C will pair with G. Hopes this helps!
Key:
T pairs with A
A pairs with T
G pairs with C
C pairs with T

what bonds in an atp molecule store the chemical energy used by cells?

Answers

Answer:

quais ligações em uma molécula atp armazenam a energia química usada pelas células?

Explanation:

espero ter ajudado boa noite

What can you infer is the reason fruit flies are the most commonly used organism for this type of investigation

Answers

In the case of genetic investigation, scientists used fruit flies as their model organism since they share 75% of the genes that cause disease with humans.  Fruit flies are also great to work in a research setting because they are relatively easy to take care of, especially compared to larger and more expensive organisms like rats or fish.Answer:

Explanation:

Hope this helps!!

which macromolecule is the main component of cell membranes

Answers

Answer:

lipids

ion know

Answer:

Lipids

Explanation:

In __________ ribosomes can attach to the mRNA and begin translation even though transcription has not been completed.

Answers

Answer:

prokaryotes

Explanation:

All cells translate using ribosomes. Prokaryotic DNA lacks a nucleus, therefore translation happens before transcription. Simultaneous transcription and translation takes place.

What is translation in prokaryotes?

In all cells, translation takes place at ribosomes. Prokaryotes translate DNA before transcription is finished because their DNA is not bound by a nucleus. Both transcription and translation take place at once. When a start codon on mRNA attached to a small ribosomal subunit is recognized by an initiator tRNA anticodon, translation can start. A second tRNA is recruited as the big ribosomal subunit joins the tiny subunit.

This is not conceivable in eukaryotes because translation takes place in the cytoplasm outside of the nucleus, whilst transcription takes place in a membrane-bound nucleus.

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Which of the following correctly describes the two phases of the cell cycle?
A. Cells grow and develop during interphase. Cells reproduce during the mitotic phase.
B. Cells grow and develop during the mitotic phase. Cells reproduce during the interphase.
C. The nucleus of a cell divides during interphase. The cytoplasm of a cell divides during mitotic phase.
D. The nucleus of a cell divides during mitotic phase. The cytoplasm of a cell divides during interphase.

Answers

Answer: the answer is A

Explanation:

Cell cycle refers to the series of processes that leads to the growth/development and division of a cell. The cell cycle uses MITOSIS for cell growth. Mitosis comprises of two distinct stages namely: INTERPHASE AND MITOTIC PHASE. The interphase is referred to as the resting phase of the cell in which the cell grows and develops.

On the other hand, MITOTIC PHASE is the stage where the actual division of the nucleus (karyokinesis) and cytoplasm (cytokinesis) generally called CELL DIVISION occurs. Therefore, the cell reproduces i.e. one cell forming two, in the mitotic phase.

After nitrogen becomes part of the lithosphere, the next change the nitrogen will under go is it will be
A used as a nutrient by plants
B fix by bacteria in the soil
C absorbed into the atmosphere by lightning

Answers

Question:-

After nitrogen becomes part of the lithosphere, the next change the nitrogen will under go is it will be:-

A. used as a nutrient by plants

B. fix by bacteria in the soil

C. absorbed into the atmosphere by lightning

Answer:-

B. fix by bacteria in the soil

Explanation:-

These bacteria are known as nitrogen-fixing bacteria. These nitrogen-fixing bacteria convert nitrogen in the soil to ammonia. Ammonia can be taken up by plants.

A mineral is defined as a natural substance that is neither animal nor plant, has a
A. specific composition and structure, and contains one or more silicon-oxygen tetrahedrons.
B. solid substance or element that is essential to human nutrition.
C. naturally occurring, crystalline, inorganic solid that contains only one element.
D. naturally occurring inorganic solid consisting of chemical elements in specific proportions, whose atoms are arranged in a repeated internal pattern.

Answers

Answer:

the answer is A. specific composition and structure, and contains one or more silicon-oxygen tetrahedrons.

Explanation:

which system is responsible for preventing pathogens from disturbing homeostasis?

Answers

Answer:

The immune system protects the host from pathogenic organisms (bacteria, viruses, fungi, parasites). To deal with this array of threats, the immune system has evolved to include a myriad of specialised cell types, communicating molecules and functional responses.

Explanation:

This is the smallest mammal.​

Answers

Answer:

bumblebee bat

Explanation:

Answer:

?

Explanation:

....................

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Transport in plants take place through a system of tube called

Answers

Answer:

Therefore this food is transported to other parts of the plant through a kind of tubes called phloem.

Explanation:

Get my Joke right u get brainlyest:

How do cows walk?

Answers

They moove ...............................

Pick the odd one out from each of the groups given below on the basis of respiratory organs. Give
reason for your answer.

(a) Cockroach, grasshopper, snail, ant
(b) Lizard, cow, earthworm, snake
(c) Crocodile, whale, dolphin, fish




fasst answer
if ur answering correctly i will sure mark u as a brainlist plz guisss

Answers

Answer:

a

Explanation:

because they are all arthropods

4. Which of the following best describes the growth of the population in the graph?
a
The population is undergoing logistic growth
b. The population is undergoing exponential growth
The population has reached its carrying capacity
d. The populations is being affected by limiting factors
Population Size
U
C.
Time
RESOURCE:
ASAP

Answers

Answer:c

Explanation:

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