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Soloha48 [4]
3 years ago
9

Which type of muscle cell propels substances or objects through internal passageways? skeletal. cardiac. smooth. striated.

Biology
1 answer:
Naddik [55]3 years ago
8 0

Answer:

Smooth muscle

Explanation:

  • The smooth muscle is one of the three types of muscle present in the human body and other animals.
  • The smooth muscle is called smooth because of its smooth appearance without any striations in its structure.
  • The smooth muscle is made of the spindle-shaped cells characterized by a single nucleus.
  • The smooth muscle cells are controlled by the autonomic nervous system and therefore is involuntary in its action.

The smooth muscle is present in the hollow organs and propels the substances through these hollow internal passages like in the alimentary canal of the digestive tract and urinary bladder.

Thus, the Smooth muscle is correct.

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You examine an epithelial cell (skin cell) and notice the chromosomes are visible however it appears there are two nuclei in the
krek1111 [17]

Answer:

The best explanation if we observe an epithelial cell with chromosomes are visible and two cell nuclei is that the cell has just gone through telophase but not cytokinesis (option b).

Explanation:

A somatic cell, when found in mitosis, exhibits the chromosomes distributed in both poles and the outline of two nuclei in the telophase phase, just before cytokinesis.

In mitotic telophase:

  • Chromatids, which are chromosomes, are found in the cell poles.
  • It initiates the formation of the nucleus membrane.
  • The chromosomes begin to turn into chromatin.
  • Disappearance of the mitotic spindle, duplication of organelles and cytoplasmic invagination.

The division and differentiation of the nuclei in telophase is called karyokinesis. Later, cytokinesis occurs, where the daughter cells are separated.

The other options are not correct because:

<em>     a and d. In the other phases described, </em><em><u>S and G1,</u></em><em> no chromosome distribution is observed at the poles.</em>

<em>     c. A somatic cell does not experience </em><em><u>meiosis</u></em><em>.</em>

6 0
3 years ago
WORTH 20 POINTS! I need help labeling B and D. Parts of a prokaryote
galina1969 [7]
B is the nucleoid
D is Ribosomes

Hope this helps :)
7 0
3 years ago
A population of pigs lives on an island together with burrowing termites. Pigs that have the longest snouts tend to survive more
LuckyWell [14K]

Answer:

picky and typical selection.

hope it helps!!!

7 0
3 years ago
What part of the scientific method do you decide if your hypothesis was right?
Harrizon [31]

Answer:

OBSERVATION is first step, so that you know how you want to go about your research. HYPOTHESIS is the answer you think you'll find. PREDICTION is your specific belief about the scientific idea: If my hypothesis is true, then I predict we will discover this. CONCLUSION is the answer that the experiment gives.

The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centuries). It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation. It involves formulating hypotheses, via induction, based on such observations; experimental and measurement-based testing of deductions drawn from the hypotheses; and refinement (or elimination) of the hypotheses based on the experimental findings. These are principles of the scientific method, as distinguished from a definitive series of steps applicable to all scientific enterprises.

1 Make an observation.

2 Ask a question.

3 Propose a hypothesis.

4 Make predictions.

5 Test the predictions.

6 Iterate.

7 0
3 years ago
I WILL GIVE BRAINLIEST IF IT'S CORRECT
iren2701 [21]

Answer: ATP releases energy when it converts to ADP .

Explanation:

During energy needs, the body cells directs the loss of a phosphate group (Pi) from ATP (Adenosine triphosphate) to yeild ADP (adenosine Diphosphate), and a further loss will yield AMP (adenosine monophosphate). For each loss energy is also released when a phosphate is removed

The reaction involves the addition of water, so it is a hydrolytic reaction, and is catalyzed by enzymes of the mitochondria, and is represented as the equation below:

ATP + H2O → ADP + Pi + free energy

7 0
3 years ago
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