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2 years ago

Which phrase should be written in the column titled "Sometimes”?

Biology

2 answers:

worty [1.4K]2 years ago

5 0

Answer: Option D

Explanation:

All the animals are multicellular and have membrane bound organelles. They have hetero tropic mode of nutrition which states that they depend on other organism for food.

Animals are sometimes asymmetrical. Else most of them have symmetry. The phylum Porifera ( sponges) show asymmetrical body organization.

Rest all the other animals show either radial symmetry or bilateral symmetry.

olga2289 [7]2 years ago

3 0

I think the answer is
D.)

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A population of rabbits lives in a forest. The habitat features many small spaces for hiding. Over many generations, the average

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Selective selection,since being smaller is an advantage the rabbits got smaller similar to evolution

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2 years ago

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Which of the following is the correct path a neural impulse will follow through the different layers of the retina? a. Rods and

Phoenix [80]

Answer:a. Rods and cones, bipolar cells, ganglion cells, optic nerve

Explanation:

The bipolar cells are present in between the rod and cone and ganglion cells.

The function of bipolar cells is to transmit signals from the photoreceptors (rod and cones cells) to the ganglion cells. The signals are then transferred to the brain via optic nerves where visual image is created.

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2 years ago

Which two phrases describe a situation that will cause a stationary object to start moving?

Varvara68 [4.7K]

Answer:

A .a net force greater than zero

B. Unbalanced Force

Explanation:

A .When the resultant force on an object is zero, it will remain at rest if it is at rest, or continue to move in a straight line at a constant velocity if it is in motion. So , the answer will be a net force greater than zero .

B . An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion. A net force = unbalanced force. So , the answer will be unbalanced forces .

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2 years ago

Growth media are used to grow microorganisms in a lab setting. Some media are liquids; others are more solid or gel-like. A grow

ludmilkaskok [199]

Answer:

Growth media are used to grow microorganisms in a lab setting. Some media are liquids; others are more solid or gel-like. A growth medium provides nutrients, including water, various salts, a source of carbon (like glucose), and a source of nitrogen and amino acids (like yeast extract) so microorganisms can grow and reproduce. Ingredients in a growth medium can be modified to grow unique types of microorganisms. For example; Nutrient agar is a general-purpose, non-selective growth media, Chocolate agar is a non selective, enriched growth medium with red blood cells that have been lysed by heat, Columbia Nalidixic Acid (CNA) and  Mannitol Salt agar  are selective agar for Gram positive organisms and MacConkey agar is a selective agar for Gram negative organisms, Mannitol salt agar MSA is a commonly used selective and differential growth medium that encourages the growth of bacteria that ferments mannitol, Nutrient broth  is an example of a liquid that supports growth of a variety of organisms.

Explanation:

Growth media are classified based on their composition as:

1. General Purpose Media: These type of media support the growth of non-fastidious organisms, that do not require special nutrients for growth, and they also serve as a base for certain modified media. An example is the nutrient agar

2. enriched media: these media, like the name implies, is one that has been modified by the addition of special growth factors and nutrients called enrichment. An example is chocolate agar where lysed blood is added to nutrient base agar, when the blood cells are lysed slowly at 80°C, nicotinamide adenine dinucleotide (factor V or NAD) and hemin (factor X), are released into the medium, and these support growth of certain fastidious organisms like Haemophilus influenza bacteria.

3. Selective media: These kinds of media contain substances that support the growth of certain organisms while in turn preventing the growth of others due to the presence of certain inhibitory factors. Examples are: Mannitol Salt Agar, which supports growth of Gram-positive organisms and MacConkey agar, which supports the growth of Gram-positive organisms

4. Non Selective media: These type of media have no biases against the growth of certain organisms, that is, they do not contain certain inhibitory factors that impede the growth of certain organisms.

5. Differential media: These media contain chromogenic agents that change colour and helps to differentiate one organism from the other, making for ease of identification especially for organisms with similar properties.

Finally, a broth is a growth medium that fo not contain agar, hence, it is liquid and not solid.

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2 years ago

A worker standing on a freshly mopped floor is adjusting products on a metal shelf. There is an exposed wire in contact with the

Semenov [28]

Answer: Workplace electrocusion

Explanation:

The human body is a good conductor of electricity. The workplace electrocution occurs due to electric shock. This leads to workplace injuries that may often lead to disabilities and can also be fetal. The workplace electrocution can also lead to cardiac arrest, and tissue damage due to thermal burns. The severity of injuries may depend upon the intensity of electricity, health of the victim and how the current flows in the body.

According to the given situation, the freshly mopped floor is a source of water and water, as well as metal, which is a good source of electricity. The electric wire is an energized source of electrical energy that will allow the flow of electric current in the body, as well as contact with the floor containing water, which will enhance the effect. Thus this is an example of workplace electrocution.

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2 years ago