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2 years ago

What is the name of the phylum where starfish are found? Why is this an appropriate name for the phylum?

Biology

1 answer:

Assoli18 [71]2 years ago

3 0

Answer:

Starfish are also referred to as sea stars because of their star-shaped appearance. They are a part of the phylum Echinodermata and are related to sand dollars, sea urchins, and sea cucumbers.

Explanation:

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During sexual reproduction, egg and sperm cells join to form a new individual. Each cell in a human contains

Zigmanuir [339]

Answer:

1.The answer is that because of the process of meiosis and fertilizations

Explanation:

4 0

2 years ago

Which of the following best describes the chemical components of paint?

Neporo4naja [7]

All/most- ethyl acetate, toluene, aliphatic polyisocyanante, hexamethylene disocyanate, methyl ethyl ketone, dibastic esters, petroleum naphta, bismuth
White - titanium dioxide, zinc
red - iron oxide, cadmium
orange- iron oxide, cadmium
yellow- iron oxide, cadmium
Green - chrome oxide
black- carbon

I got tired of typeing so ----basically they are all made of a pigment which can be a range of chemicals, resin, solvent, and additives. If you are just looking for the main elements in paint, it is silicone, oxygen, and a salt so sodium, chlorine, maybe iodine, or a salt substitute like potassium chloride, potassium nitrate, or calcium hydroxide.

5 0

3 years ago

Which hormone released during fetal development is primarily responsible for preparing breasts for lactation?

alexira [117]

Human placental lactogen( hPL) hormone released during fetal development is primarily responsible for preparing breasts for lactation.

Human placental lactogen also stimulates milk ,known as human chorionic somatomammotropin. It's made by the placenta. It gives nutrition to the fetus. secretion of milk is called lactation

Mother milk contains all the nutrients that an child needs in the first 6 months of life, including fat, carbohydrates, proteins, vitamins, minerals and water. It's fluently digested and efficiently used. secretion of milk is called lactation. bone milk also contains bioactive factors that compound the child's immature vulnerable system, furnishing protection against infection, and other factors that help digestion and immersion of nutrients. mother milk also protect the child from disease.

To learn more about Human placental lactogen.

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6 0

1 year ago

In cattle, RR = red, Rr = roan, and rr = white. What are the predicted color phenotypes for the offspring from crosses between:

timofeeve [1]

Answer:

a) 100% roan

b) 50% red, 50% roan

c) 50% roan, 25% red, 25% white

Explanation:

a) A red bull has the phenotype RR, a white cow has the phenotype rr. Let's do a punnett square. In its gametes, the bull only has R alleles to pass on, and the cow only has r alleles to pass on:

Bull

R R

r Rr Rr

Cow

r Rr Rr

The offspring can only be Rr, so all of them will be roan. (100% roan).

b) A red bull has the phenotype RR, a roan cow has the phenotype Rr. Let's do a punnett square. In its gametes, the bull only has R alleles to pass on, and the cow has an R allele and an r allele to pass on:

Bull

R R

R RR RR

Cow

r Rr Rr

50% of the offspring will be RR, and 50% will be Rr. So half of the offspring will be red, and half will be roan.

c) A roan bull has the phenotype Rr, a roan cow has the phenotype Rr. Let's do a punnett square. In its gametes, the bull has an R allele and an r allele to pass on, and the cow also has an R allele and an r allele to pass on:

Bull

R r

R RR Rr

Cow

r Rr rr

25% of the offspring will be RR, 50% will be Rr, and 25% will be rr. So half of the offspring will be roan, a quarter will be red, (RR), and a quarter will be white (rr)

6 0

3 years ago

Which of the following statements about Polymerase Chain Reactions is wrong?

KonstantinChe [14]

Answer:

The correct answers will be option-B

Explanation:

The polymerase chain reaction is the technique which involves the chain of reaction. The reactions are performed which polymerises or make exact copies of the DNA in higher number from a small sample in vitro-conditions.

The PCR technique is based on the DNA replication mechanism which involves the DNA primers and Taq polymerase, a type of DNA polymerase enzyme.

The PCR proceeds in three steps that are denaturation, annealing, and extension in which the DNA is denatured to break the hydrogen bonds, the addition of the primers at both ends called reverse and forward primers which function simultaneously, synthesis of DNA and extension in which the sample is cooled.

Since the primers are added to both the strands and not on the same strands therefore, the selected option is the correct answer.

5 0

3 years ago