Answer:
Nuclear envelop
Explanation:
Nuclear envelop is the double membrane structure that makes the boundary of the nucleus. It serves to protect the DNA from the toxins, wastes and other harmful substances produced during metabolic reactions of the cell occurring in cytoplasm.
If the nuclear envelope does not protect DNA, DNA could be damaged by free radicals or toxins. A cell with damaged DNA is subjected to death.
Answer:
The Nucleus.
Explanation:
The nucleus is surrounded by a membrane called the nuclear envelope, which protects the DNA.
Answer:
People can transfer pollen from one flower to another, but most plants are pollinated without any help from people. Usually plants rely on animals or the wind to pollinate them. When animals such as bees, butterflies, moths, flies, and hummingbirds pollinate plants, it's accidental. hope that helps love!!
to bring oxygen into the lung
B.
to put carbon dioxide into all blood vessels
C.
to expel waste products from the body
D.
to transport materials throughout the body
D
oh yeah oh yeah oh yeah
Answer:
The most accepted theory about the origin of Earth is that it formed by a process called planetary accretion
Explanation:
The most accepted theory about the origin of Earth is that it formed by a process called planetary accretion. In this process, the Earth is believed to have been formed from a cloud of gas and dust that remained following the Sun's formation. This cloud of gas and dust is referred to as the solar nebula.
Differentiation refers to the process by which the various layers of the earth were formed; core, mantle, and crust
Answer:
It's Accretion
Organisms are living beings, which can have cellular level or organ level development. The cells make up tissues and tissues constitute to make organs.
The correct answer is:
Option B. tissues
The high-level organisms are made up of a complex system. The cells are the structural and functional unit of life, which makes up the organism.
The hierarchy of the organ system development includes:
1. Cells - The unit of life that can exist in groups or as a single entity.
2. Tissues - The group of cells performing similar functions is known as tissues.
3. Organs - The group of tissues carrying out a function is known as an organ. Organs are directly made up of tissues.
4. Organ system- The biological systemconsists of groups that work in coordination to perform one or more functions.
Therefore, Option B is correct.
To know more about tissues and organs, refer to the following link:
A. true
B. false
Answer: False, they have theories but nothing is certain.
Explanation: