What are 2 natural resources or products made from natural resources that can be recycled?

How does blood defend against pathogens and toxins

Darina [25.2K]

Blood carries immune system cells, known as white cells or leukocytes. Some examples of white cells are phagocytes and lymphocytes.

Phagocytes ingest and dissolve pathogens, as well as strange particles or dying cells.

Lymphocytes are divided into T cells, B cells, and natural killer cells (NK). B cells produce antibodies to respond to foreign cells, T cells attack pathogens using enzymes and other non-antibodies responses, while NK cells combat tumors and cells infected by viruses.

5 0

1 year ago

Females of many insect species, including honeybee queens, can store gametes shed by their mating partners in _______. A. their

Anit [1.1K]

In the spermatheca, females of many insect species, including honeybee queens, can store gametes secreted by their sex partners.

<h3>What is Spermatheca ?</h3>

The female insect's spermatheca is an ectodermal structure that receives, stores, and releases sperm for egg fertilization. According to the species, spermathecae differ in size and shape.

They often come from the median oviduct, which is located close or on the genital chamber. A secretory duct called the ductus seminalis connects the spermathecal sac, also known as the receptaculum seminis, to the genital chamber, where the sperm are released.
The number of spermathecas varies among taxa, however the majority of insects only have one. Depending on the species of insect, the spermatheca has different morphologies. The spermatheca is composed of the spermathecal gland, duct, and reservoir. Both of these fluids feed the sperm. Both the spermathecal glands and the male accessory glands secrete substances that feed the sperm.

So lastly we can say that, t females of many insect species, including honeybee queens, can store gametes shed by their mating partners in - the spermatheca.

To know more about Spermatheca please click here : brainly.com/question/9748392

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3 0

1 year ago

There is _____ support for claims that hypnosis can help people to recover memories. growing strong strong and growing little

Tom [10]

Answer:

growing little

Explanation:

3 0

3 years ago

Which six elements provide most of the mass of the human body? 0 C, N, P S, H, 0 0 C, Mg, P, H, O, N O Mn, Na ), H, Ca, o O Ur,

Natali5045456 [20]

Answer:

H, He. 2, Li, Be, B, C, N, O, F, Ne. 3, Na, Mg, Al, Si, P, S, Cl, Ar. 4, K, Ca, Sc, Ti ... 7, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lr ... (Atomic mass is also referred to as atomic weight, but the term "mass" is more ... One molecule of water (H2O) would weigh 18.02 amu (2×1.00797 amu for H + ... 6, C, Carbon, 12.011.

Explanation:

6 0

3 years ago

Rna primers must be present on which strand during dna synthesis?

Tanya [424]

Answer:Both on the leading strand and on each okazaki fragments of the lagging strand.

Explanation:

A primer is a short single-stranded RNA nucleotide that initiate DNA synthesis at the replication fork. Because DNA polymerase can not initiate replication on it own short strand of RNA primer synthesized by an enzyme RNA primase is needed to initiate DNA polynucleotide synthesis.

RNA primer is present on both leading and lagging strand.

RNA primer of about 10 nucleotides long are present on the leading strand and on each okazaki fragments on the lagging strand to initiate replication. The RNA primer is removed and replaced by DNA nucleotides by DNA polymerase.

6 0

3 years ago