If you were trying to identify an unknown adult animal that must be either an echinoderm or chordate, which morphological feature(s) would guarantee that your organism was an echinoderm rather than a chordate.

Answers

Answer 1
Answer:

Answer:

The radial symmetry and mesodermal skeleton in echinodems

Bilateral symmetry and internal skeleton of chordates

Explanation:

The echinoderms have radial symmetry and their skeleton is mesodermal made up of calcites known as ossicles while the chordates have bilateral symmetry and their internal skeleton is made up of bones and cartilages.


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Which of the following statements about DNA isolation from E. coli is not correct?a. chemical extraction using phenol removes proteins from the DNAb. RNA is removed from the sample by RNase treatmentc. detergent is used to break apart plant cells to extract DNAd. lysozyme digest peptidoglycan in the bacterial cell walle. centrifugation separates cellular components based on size
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How can you indentify the difference between a chemical and physical change and what are signs that a chemical change has occurred

Answers

Answer:

chemical change changes the identity of a substance, while a physical change can just be observed. Some signs that a chemical change has occurred are, temperature change, forming bubbles, color change, new substance forming, there are more, but those are just some of which i now

Explanation:

hope this helped!!!<3

Answer:

Explanation:

The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. ... After ice melts into liquid water, you can refreeze it into solid ice if the temperature drops. Freezing and melting are physical changes.

Name one thing that Darwin observed on the Galapagos Islands that supported his theory of evolution by natural selection

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Name one thing that Darwin observed on the Galapagos Islands that supported his theory of evolution by natural selection similar but not identical species of finches inhabited islands near the Galapagos.

What did Darwin observe in the Galapagos Islands?

In the archipelago, Darwin observed birds with different beak shapes, which he later discovered were all finches. Looking closely, he noticed that each beak shape helped in a way of feeding: wide and robust beaks for eating hard seeds, those more tapered for insects and larvae.

Darwin saw that variation and selection produced adaptations not only in the structure of the feet, but also in the shape and size of the beaks.

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Darwin discovered that different species of finches lived on different islands. These different species had different looking beaks. Some meant for berries, some meant for nuts, and some meant for bugs.

2. Sperm and egg combine in ______________ to produce a zygote with the normal number of chromosomes.

Answers

I think in the Fallopian tubes

Answer:

Fertilization

Explanation:

Stereoscopic vision, grasping hands and flat nails rather than claws seem to be good adaptations to living in trees. However, some scientists have hypothesized that these traits were more likely selected for catching small prey. Why?

Answers

Answer:

This is due to the general nature of the body's features.

Explanation:

The traits are important in the survival of the creatures. For example, a keen vision is needed to spot prey that is several meters or kilometers away. In addition, the claws serve different functions. For example, the claws are there to rest on the patch of the tree and hold firmly. In addition, the claws are for tearing prey. Further, the claws are for holding and lifting prey and suffocating it if necessary.

We find DNA on the ___, In every living cell that an organism ownsa. chromosomes
b. reproduction
c. mitosis

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We find DNA on the chromosomes, in every living cell that an organism owns. So, the correct option is A.

What is Chromosome?

The word chromosome comes from the Greek words for color (chroma) and body (soma). Chromosomes are so named because they are cell structures, or bodies, that are strongly stained by certain color dyes used in research.

Chromosomes are defined as structures found inside the nucleus of a cell that are organized into genes from proteins and DNA. Each cell normally has 23 pairs of chromosomes.

These are threadlike structures which are made of protein and a single molecule of DNA that serve to carry the genomic information from cell to cell.

Therefore, the correct option is A.

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Answer:

A. Chromosomes

Explanation:

A Chromosome is some thing carrying genetic information in the form of genes.

All of the following statements are true, except: Question 24 options: 1) Renin is a hormone produced by JG cells 2) JG cells are present in the vasa recta 3) Macula densa cells are present in the ascendinng limb of henle's loop and distal convoluted tubule 4) The JG apparatus play a role in BP regulation

Answers

Answer:

2) JG cells are present in the vasa recta.

Explanation:

The vasa recta is a web of the blood capillary which supply blood to the medulla region of a kidney due to its high permeability of solutes and water. It runs parallel to the loop of Henle. It does not composed of the  juxtaglomerular cells (JG cells). The juxtaglomerular cells (JG cells) present in kidney which synthesise and stores enzyme renin. Thus, option 2) JG cells are present in the vasa recta is not a true statement.