BIOLOGY HIGH SCHOOL

Which activity can occur without the use ofenergy?
(1) contraction of muscle tissue
(2) protein synthesis in a cell
(3) active transport of minerals
(4) movement of water across a membrane

Answers

Answer 1
Answer:

Answer;

-Movement of water across a membrane

Explanation;

-Movement of water molecules across a membrane is an example of passive transport . Passive transport involves movement of ions and other atomic or molecular substances across cell membranes without need of energy input.

-Unlike active transport, passive transport does not require an input of cellular energy (ATP). Examples of types of passive transport are osmosis and diffusion.

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The colored part of the human eye is the A. retina.
B. iris.
C. pupil.
D. cornea.

Answers

B. Iris
It expands and contracts allowing light to enter through the pupil
The colored part of your eye is the iris, B.

Which fungus is unicellular?

Answers

yeasts is a fungus that is unicellular

Yeast is the answer.

I what way does the red blood cell differ from most other animal cells​

Answers

Red blood cells lack a nucleus and have limited organelles, allowing more space for carrying oxygen. They have a unique biconcave shape, short lifespan, and cannot undergo cell division. Their specialization lies in oxygen transport, making them highly efficient in their function.

What are red blood cells?

Red blood cells (RBCs), or erythrocytes, are disk shaped blood cells without a nucleus and most organelles. Their main role is to transport oxygen throughout the body, facilitated by the protein hemoglobin. Hemoglobin binds to oxygen in the lungs and releases it to body tissues.

Due to hemoglobin, RBCs appear red and give blood its color. They have a lifespan of about 120 days and are continually replaced in the bone marrow. RBCs are vital for maintaining proper oxygenation of tissues and supporting metabolic functions.

Their unique structure and function make them essential components of the circulatory system in vertebrates, including humans.

Learn more on redblood cells here brainly.com/question/2994911

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Answer:

It is different because they have no nucleus and can easily change shape.

Explanation:

Most other cells cannot do this.  

I hope this helps!!

A farmer's fields, which are close to a stream, has experienced a lot of runoff. One possible effect of the runoff is that the stream will have a decreased level of fertilizers from the field. True od False

Answers

Answer: False

Surface run off is a kind of water erosion in which the surface layers of the top soil containing minerals and sediments is wiped out by the water and deposited to some other place. In the given situation, the surface run off of the farmer's field close to the stream will likely to remove the fertilizers hence,the level of the fertilizers in the stream is likely to increase.
it's false. the runoff will increase the fertilizers in the stream, because it takes whatever is siting on the surface.

Translation of mRNA into segments of tRNA allows which organic molecules to combine to form proteins at the ribosome?

Answers

Answer:

The correct answer would be amino acids.

Translation is the process of formation of polypeptide chain in which nucleotide sequence of DNA is decoded to amino acid sequence via mRNA.

It takes place at ribosomal site in a cell where mRNA is placed between small and large sub-units of the ribosome.

tRNA decodes the mRNA codon sequence with the help of anti-codon site present in it.

Positive interaction between codon and anti-codon site leads to the addition of specific amino acids to the growing polypeptide chain from charged tRNA.
It allows amino acids to form proteins

Strawberry plants typically reproduce by making runners, which are miniature versions of themselves, that grow off of the roots and stems of the parent. This type of vegetative reproduction is known as A) pollination. B) fragmentation. C) binary fission. D) vegetative propogation.

Answers

The runners of strawberry plants are also called as the stolons. The strawberry plant vegetatively PROPAGATES with the help of these runners, and the base of the plant lies above the soil-surface, from which the stolons grow. Stolons are horizontal connection between the plants.

The answer is D.) Vegetative propogation.
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