Scientists believe that ancient ancestors of all animals were.A. Single-celled prokaryotes that reproduced asexually
B. Single-celled eukaryotes that sometimes grew in colonies
C. Multi-cellular organisms that were probably autotrophic.
D. Multi-cellular organisms with an alternation of generations lifecycle.

Answers

Answer 1

Answer:

The correct answer is B. Single-celled prokaryotes that sometimes grew in colonies

Answer 2

Answer: A is the answer
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Movement caused by warmer fluids rising and cooler fluids sinking is called ______________.

Answers

The movement caused by warmer fluids rising and cooler fluids sinking is called convection currents.

What is convection current?

The convection currents are the outcome of differential heating. The less dense, that is, lighter warm substances rise, while the denser, that is, heavier cool substance sinks. It is this movement that generates patterns of circulation called convection currents, in water, in the atmosphere, and in the mantle of the Earth.

Thus, convection currents are the answer.

To learn more about convection currents click here:

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Answer:

Explanation:

convection current

Which of the following best describes a characteristic of Fungi that differentiates them from Bacteria?a.Fungi are eukaryotes, while Bacteria are prokaryotes.

b.Bacteria are heterotrophs, while Fungi are autotrophs.

c. Bacteria have gametangia, while Fungi do not.

d.Fungi have cell walls, while Bacteria do not.

Answers

Fungi are eukaryotes, while bacteria are prokaryotes is the statement among the following statements given in the question that best describes a characteristic of Fungi that differentiates them from bacteria. The correct option among all the options that are given in the question is the first option or option "a".

Brocas area?a. is usually found in the right hemisphere
b. corresponds to brodmanns area 8
c. is considered a motor speech area
d. lateral geniculate body

Answers

As for this, the most probable and the most likely answer would be C. is considered a motor speech area.

The Broca's Area is usually found in the left hemisphere, not on the right hemisphere. It corresponds to brodmanns areas 44 and brodmanns areas 45, not brodmanns area 8. Also, it isn't a lateral geniculate body. Since its discovery, there have been researches and studies made and experiments conducted to discover its purpose. In the evolution of our overall knowledge, it has been claimed that the Broca's Area is the motor center of speech.

The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic common to all of these extracellular structures?A) They must block water and small molecules in order to regulate the exchange of matter and energy with their environment.
B) They must permit information transfer between the cell's cytoplasm and the nucleus.
C) They must provide a rigid structure that maintains an appropriate ratio of cell surface area to volume.
D) They are constructed of polymers that are synthesized in the cytoplasm and then transported out of the cell.
E) They are composed of a mixture of lipids and carbohydrates.

Answers

Answer:

D) They are constructed of polymers that are synthesized in the cytoplasm and then transported out of the cell.

Explanation:

Proteins, complex carbohydrates, lipids are important polymer components of the cell wall of bacteria, fungi, and extracellular matrix of animal cells. These all structures are located outside the plasma membrane but the raw material required to make these structures are synthesized inside the cell in the cytoplasm and exported outside the cell membrane by transporters.

Therefore cell walls of different organisms and extracellular matrix of animal cells are constructed of polymers that are produced in cytoplasm and are transported outside the membrane.

A scientist takes a cell from one cow and an egg from a second cow. The scientist removes the DNA from the egg and replaces it with the DNA from the first cow. The scientist’s goal is to produce a baby cow with DNA that is identical to the first cow.Which best describes this scenario?

genetic engineering
gene therapy
cloning
selective breeding

Answers

Answer:

Cloning I'm pretty sure

Explanation:

Answer:

Cloning

Explanation:

The science of grouping and naming organisms is called what.

Answers

taxonomy is the science of naming organisms

Taxonomy is the science of grouping and naming organisms.

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