Answer:
Chromosomes are passed down from parents (eggs and sperm). A specific kind of chromosome contains a gene that determines how the gene is inherited. Each person has two alleles and one is inherited from the mother and the other from the father. There are 46 chromosomes and 23 from each parent mixed around to figure which gene is going to be seen. Each egg carries an X chromosome and each sperm carries an X or Y chromosome and if there is two X chromosomes then it's a baby girl and if it is a X and a Y chromosome it's a boy.
Answer:
The correct answers are: Neurotransmitter Vesicles, Acetylcholine, Contraction.
Explanation:
- At the neuro-muscular junction, impulses are transmitted in the following manner:
- The impulse is carried by an action potential (variable opening and closing of different ion channels located on the membrane of the neurons allowing variable ion movement) to the neuron at the neuro-muscular junction.
- The action potential causes the opening of the voltage dependent calcium channels in the axon terminal of the neuron allowing the entry of calcium ions.
- This causes the neurotransmitter vesicles containing the neurotransmitter acetylcholine to fuse with the pre-synaptic membrane.
- Acetylcholine is released by the method of exocytosis into the synaptic cleft.
- The acetylcholine molecules bind to the the cognate receptors present in the membrane of the muscle cell (sarcolemma).
- This causes the flow of sodium ions into and potassium ions out of the muscle cell, which generates action potential in the muscle cell.
- This action potential causes the muscle cell to contract.
I hope you meant, a cross between BbPp and BbPp, else for bbpp x bbpp, all the progeny will be bbpp.
We need to work out a Punnett square to determine the genotypes resulting from the cross between BbPp and BbPp. The dyhybrid cross results in 16 different genotypes, of which a few have the same phenotypes.
It can be seen that there are 4 different kinds of phenotypes present, in the ratio 9:3:3:1.
<span>1. Which of the following is an ABIOTIC factor?
C. Rocks
2. What is an input of photosynthesis AND flows through the Carbon Cycle? *
B. Carbon Dioxide
3. Where is/can carbon be stored for long periods of time (longer than a lifetime)? *
A. In rocks
4. Where is carbon found?
D. All of the above
5. How are cellular respiration and photosynthesis related to the carbon cycle? (no multiple choice it's a written answer)
</span>in order to live, people and animals inhale oxygen and give out carbon dioxide. Carbon dioxide is taken by plants in a process called photosynthesis and it is used in the presence of <span>energy from sunlight to produce carbohydrates and oxygen. </span>
Answer:
Mitochondria and Chloroplasts
Explanation:
Mitochondria and plastids (like chloroplast) each have their own DNA due to at one point being prokaryotes with their own DNA.
