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LenaWriter [7]
3 years ago
6

There is a spot on the retina commonly called the “blind spot.” the blind spot exists because ________.

Biology
2 answers:
DIA [1.3K]3 years ago
4 0
That is where the fibers of the optic nerve exit the eye extending into the brain. there are no rods and cones there as a result.
vovangra [49]3 years ago
3 0

Answer:

The correct answers - there are no photo-receptor in this spot and therefore no image detection.

Explanation:

Blindspot is a small part or region of the visual field of eyes on the retina which is also known as the optic disk or optic nerve head. In this portion, there is no rods or cones present which is photoreceptors that detect the image in the retina.

Blindspot is the region where the nerve fiber moves out from the back of the eye. Blindspot term is called a blind spot as it does not detect any image in this spot or portion of the retina.

Thus, the correct answer is - there are no photo-receptor in this spot and therefore no image detection.

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Answer:

The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled.

Explanation:

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Pearl earrings come from _____. echinoderms arthropods mollusks sponges
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Where can you observe environmental changes that are forcing adaptation?
Helen [10]

Answer:

Description

Since its inception, life on earth has had to adapt to changing environmental conditions - this represents a driving force of evolution.

This module examines how organisms detect and respond to changes in their environment, and reviews the different behavioural, physiological and molecular mechanisms underpinning environmental (stress) adaptation.

Understanding these organism-environment interactions forms the very foundations of ecology. Examples are provided from a range of organisms, but a specific focus is given to terrestrial invertebrates (insects) and plants.

The term “environment” covers a broad spectrum of spatial scales, from changes occurring at the cellular level, to large scale geographic differences between major climatic zones (polar, temperate and tropical).

The process of “change”, and adaptation to these changes, will in turn be discussed across a broad spectrum of timescales. These include:

The requirement for rapid adaptation to potentially dramatic shifts in environmental conditions, e.g. when a parasite first enters its host

Longer-term changes and adaptations across seasonal timescales, e.g. hibernation/insect diapause

Adaptation on an evolutionary timescale, e.g. the ‘Red Queen’ hypothesis, across scenarios of past environmental changes, and extending out to current predictive climate change models

The main aims of this module are to provide students with information, guidance, and access to resources, that will allow them to:

Gain an in depth understanding of how organisms respond and adapt to changes in their environment.

Recognize that the term “environment” covers a continuum of spatial scales from molecular environments within cells, to broad-scale geographic environments and climatic zones.

Appreciate that adaptation to environmental change for an individual organism is transient and occurs across a temporal spectrum of seconds to seasons. For species, adaptation is long-term, but not fixed/permanent, and occurs across a timescale of generations.

Interpret the potential impact of climate change on species, communities and ecosystems. Specifically with respect to how the rate of environmental change may limit effective adaptation, and so result in changes in species distribution and abundance patterns

Become effective independent learners, capable of analysing and interpreting the scientific literature to help formulate and express their own ideas

Explanation:

hope it help to you read rhis to answer your question po

7 0
2 years ago
Help me please thank you
Marianna [84]

The answer is A or the first one

3 0
3 years ago
Read 2 more answers
Select the correct answer from each drop-down menu.
chubhunter [2.5K]

Answer:

It contains Uracil (U) instead of Thymine (T).

Reason for primer removal:

This is because of their uracil nucleotide which is absent in DNA. Instead of Uracil DNA contains Thymine nucleotide.

Explanation:

Primers:

Primers are a short sequence of RNA. These sequences attached to the 5' end are the requirement of DNA polymerase to start the process of replication.

Primer removal:

After replication, these short fragments of RNA are removed to replaced with DNA from the newly synthesized DNA strand.

Reason for primer removal:

This is because of their uracil nucleotide which is absent in DNA. Instead of Uracil DNA contains Thymine nucleotide.

Best Answer:

Because It contains Uracil (U) instead of Thymine (T).

4 0
3 years ago
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