Which type of muscle is used primarily for voluntary actions?a. skeletal
b. smooth
c. cardiac
d. both
b. and
c.

Answers

Answer 1

Answer: The skeletal muscle is used, so A.

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Reclamation restores an environment affected by mining to a state where it can sustain its ecosystem. Please select the best answer from the choices provideda. True b. False

Why is the understanding of classification an important life skill

Answers

so that you can be organized in your home or for school or work and you can categorize things to arrange them

Answer: so that you can be organized in your home or for school or work and you can categorize things to arrange them

Explanation:

A ____ is any part of the experiment that can vary or change during the experiment. A. control B. variable C. temperature D. hypothesis

Answers

Answer:

Explanation:

Your hypothesis can and will most likely change during the activity.

Which of the following statements about stability is NOT true?a. Skilled athletes have high levels of stability.
b. Stability can be learned through practice.
c. Stability is genetic and cannot be improved.
d. Stability requires an awareness of your center of gravity.

Answers

The correct answer is C.stability is genetic and cannot be improved. This is incorrect. Just think of when you ride a bike, it's not a genetic thing and anyone can learn it if they learn how to balance their center of gravity and their movement. It's not a genetic thing so only a few chosen people can ride a bike.

The correct answer is C.

Blood is a mixture both of a ------- and a -------- (fill in the blank)

Answers

Blood is a heterogeneous mixture because the blood cells are physically separate from the blood plasma. The cells have different properties than the plasma. The cells can be separated from the plasma by centrifuging, which is a physical change. Since it can be separated mechanically, it is not a chemical compound

Many differences in gene sequences between species, and also among individuals within a species, consist of single nucleotide polymorphisms. Choose the statement that best explains why these types of differences are among the most common DNA changes observed?

Answers

Answer:

A single nucleotide polymorphism (SNP) is the most common gene variation found among people. A SNP represents a change in a single DNA block, called a nuecleotide, being able, for example, to replace a nucleotide cytosine (C), with a nucleotide thymine (T), guanine (G) or adenine (A) in the genome. They represent the 90% of all the human gene variations.

Explanation:

Consider the following events of photosynthesis. 1. Light energy excites electrons. 2. Water molecules are split. 3. NADPH is formed. In which locations do each of these events occur? 1. photosystem II 2. photosystem I 3. photosystem I 1. photosystem II 2. photosystem II 3. photosystem I 1. photosystem I 2. photosystem I 3. photosystem II 1. photosystem I 2. photosystem II 3. photosystem II

Answers

Answer: Option B. 1. photosystem II 2. photosystem II 3. photosystem I

Explanation:

Photosynthesis is the process by which plants make their own food in the presence of light utilizing carbon dioxide and water. this process occurs in chloroplast which contains green pigments called chlorophyll.

Photosystem are defined as the cluster of chlorophyll pigments found on the thylakoid membrane ( in chloroplast) which functions to collect energy and concentrate it to reaction center which further uses the energy to excite electrons and pass on to enzymes.

Photosystem II absorbs light and energy which allows the excitation of electrons and creates an electron deficiency in Photosystem II. the deficiency filled by Z protein which contain manganese that stimulates splitting of two water molecules.

NADPH formation takes place in Photosystem I. Photosystem I accepts energy from light which excites an electron and passed on to an electron acceptor called FeS. FeS then passes its e- to Ferrodoxin which donates its electron to NADP+ reductase. NADP+ reductase donates electron to NADP+ and add a proton to form NADPH to get stabilized.

Hence, the correct option is B.

Answer:

Explanation:

i took the test on engenuity 2020

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The cell membrane of a red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Since other substances are blocked from coming in, this membrane is called A. perforated. B. semi-permeable. C. non-conductive. D. permeable.

This involves replacing faulty genes with normal working genes in order to provide a “cure” for a genetic disorder:a. DNA fingerprinting c. Human Genome Project b. gene therapy d. allele testing